diff --git a/classes/ComicPress.inc b/classes/ComicPress.inc
index 20af209..72ac4eb 100644
--- a/classes/ComicPress.inc
+++ b/classes/ComicPress.inc
@@ -31,6 +31,7 @@ class ComicPress {
   	),
     'helpers'             => array(),
 		'storyline_order'     => '',
+  	'active_backends' 		=> null
   );
 
   var $backends = array();
@@ -141,6 +142,8 @@ class ComicPress {
   }
 
   // @codeCoverageIgnoreStart
+  function _get_declared_classes() { return get_declared_classes(); }
+  // @codeCoverageIgnoreEnd
 
   /**
    * Initialize the class.
@@ -153,13 +156,28 @@ class ComicPress {
 
 		$this->normalize_image_size_options();
 
-    foreach (get_declared_classes() as $class) {
-    	if (preg_match('#^ComicPressBackend.+Factory$#', $class) > 0) {
-    		$this->backends[] = new $class();
-    	}
-    }
+		foreach ($this->normalize_active_backends() as $class) {
+    	$this->backends[] = new $class();
+		}
   }
 
+  function normalize_active_backends() {
+  	$available_backends = array();
+  	foreach ($this->_get_declared_classes() as $class) {
+  		if (preg_match('#^ComicPressBackend(.*)Factory$#', $class, $matches) > 0) {
+				$available_backends[] = $class;
+  		}
+  	}
+
+		if (!is_array($this->comicpress_options['active_backends'])) {
+			$this->comicpress_options['active_backends'] = array();
+		}
+
+		$this->comicpress_options['active_backends'] = array_intersect($available_backends, $this->comicpress_options['active_backends']);
+  }
+
+  // @codeCoverageIgnoreStart
+
   function announce_activated_helpers() {
     echo "<center>[ <strong>Activated ComicPress helpers:</strong> " . implode(", ", array_keys($this->comicpress_options['helpers'])) . " ]</center>";
   }
@@ -248,5 +266,3 @@ class ComicPress {
 		return false;
 	}
 }
-
-?>
diff --git a/classes/backends/ComicPressBackendAttachment.inc b/classes/backends/ComicPressBackendAttachment.inc
index 3fe52db..35abfc3 100644
--- a/classes/backends/ComicPressBackendAttachment.inc
+++ b/classes/backends/ComicPressBackendAttachment.inc
@@ -46,6 +46,10 @@ class ComicPressBackendAttachment extends ComicPressBackend {
 }
 
 class ComicPressBackendAttachmentFactory {
+	function __construct() {
+		$this->description = __('Uses post attachments as comic images.', 'comicpress');
+	}
+
 	function generate_from_post($post) {
 		$result = array();
 		if (is_object($post)) {
@@ -71,7 +75,6 @@ class ComicPressBackendAttachmentFactory {
 		return $result;
 	}
 
-
 	function generate_from_id($id) {
 		if (strpos($id, 'attachment-') === 0) {
 			$id = str_replace('attachment-', '', $id);
diff --git a/classes/backends/ComicPressBackendFilesystem.inc b/classes/backends/ComicPressBackendFilesystem.inc
index 913745a..f014177 100644
--- a/classes/backends/ComicPressBackendFilesystem.inc
+++ b/classes/backends/ComicPressBackendFilesystem.inc
@@ -239,6 +239,10 @@ class ComicPressBackendFilesystemFactory {
 
 // @codeCoverageIgnoreStart
 class ComicPressBackendFilesystemAdmin {
+	function __construct() {
+		$this->description = __('Uses files on the filesystem as comic images, similar to ComicPress Legacy.', 'comicpress');
+	}
+
 	function options_admin() {
 		$pattern = ComicPressBackendFilesystemFactory::_get_search_pattern();
 
diff --git a/classes/backends/ComicPressBackendURL.inc b/classes/backends/ComicPressBackendURL.inc
index 91c42eb..774b30f 100644
--- a/classes/backends/ComicPressBackendURL.inc
+++ b/classes/backends/ComicPressBackendURL.inc
@@ -56,6 +56,10 @@ class ComicPressBackendURL extends ComicPressBackend {
 }
 
 class ComicPressBackendURLFactory {
+	function __construct() {
+		$this->description = __('Uses URLs assigned to posts as comic images.', 'comicpress');
+	}
+
 	function generate_from_id($id) {
 		if (preg_match('#^url-([0-9]+)-(.+)$#', $id, $matches) > 0) {
 			list($all, $post_id, $key) = $matches;
diff --git a/classes/backends/partials/backend-filesystem/options-admin.inc b/classes/backends/partials/backend-filesystem/options-admin.inc
index 53afe3b..6fef2d2 100644
--- a/classes/backends/partials/backend-filesystem/options-admin.inc
+++ b/classes/backends/partials/backend-filesystem/options-admin.inc
@@ -16,6 +16,7 @@
 	</p>
 	<ul>
 		<li><?php _e('<strong>%wordpress%</strong>: the local path to the WordPress installation', 'comicpress') ?></li>
+		<li><?php _e('<strong>%upload-path%</strong>: the value of the upload_path option, used by WMPU', 'comicpress') ?></li>
 		<li><?php _e('<strong>%type%</strong>: the image type short name', 'comicpress') ?></li>
 		<li><?php _e('<strong>%type-folder%</strong>: the image type folder', 'comicpress') ?></li>
 		<li><?php _e('<strong>%date-(pattern)%</strong>: the date of the post as run through the date() function. Ex: <em>%date-Y-m-d%</em>', 'comicpress') ?></li>
diff --git a/classes/partials/_comic-image-types.inc b/classes/partials/_comic-image-types.inc
new file mode 100644
index 0000000..3f13266
--- /dev/null
+++ b/classes/partials/_comic-image-types.inc
@@ -0,0 +1,12 @@
+<h3><?php _e('Comic Image Types', 'comicpress') ?></h3>
+<div id="comicpress-image-types-holder" class="comicpress-holder">
+	<div id="image-type-container">
+		<?php foreach ($this->comicpress->comicpress_options['image_types'] as $type => $info) { ?>
+			<?php include('_image-type-editor.inc'); ?>
+		<?php } ?>
+	</div>
+	<a id="add-new-image-type" href="#">[+] Add a new image type</a>
+	<script type="text/javascript">ComicImageTypes.setup()</script>
+
+	<input class="button-primary" type="submit" value="<?php _e('Submit Updated ComicPress Options', 'comicpress') ?>" />
+</div>
diff --git a/classes/partials/_storyline-order.inc b/classes/partials/_storyline-order.inc
new file mode 100644
index 0000000..ca09306
--- /dev/null
+++ b/classes/partials/_storyline-order.inc
@@ -0,0 +1,17 @@
+<h3>
+	<?php _e('Storyline Order', 'comicpress') ?>
+</h3>
+<div id="comicpress-storyline-category-order-holder" class="comicpress-holder">
+	<input type="hidden" name="cp[storyline_order]" value="" />
+	<div id="storyline-sorter">
+		<div class="cp-children">
+			<?php
+				$this->_render_admin_storyline_tree(reset($storyline->get_simple_storyline()))
+			?>
+		</div>
+	</div>
+	<script type="text/javascript">Storyline.setup()</script>
+	<p><em><?php _e('(drag and drop desired order. categories can be modified on the Posts -> Categories page)', 'comicpress') ?></em></p>
+
+	<input class="button-primary" type="submit" value="<?php _e('Submit Updated ComicPress Options', 'comicpress') ?>" />
+</div>
diff --git a/classes/partials/options-admin.inc b/classes/partials/options-admin.inc
index 015bd64..dd80b14 100644
--- a/classes/partials/options-admin.inc
+++ b/classes/partials/options-admin.inc
@@ -5,36 +5,9 @@
 		<input type="hidden" name="cp[action]" value="comicpress-options" />
 		<input type="hidden" name="cp[_action_nonce]" value="<?php echo esc_attr($action_nonce) ?>" />
 
-		<h3>
-			<?php _e('Storyline Order', 'comicpress') ?>
-		</h3>
-		<div id="comicpress-storyline-category-order-holder" class="comicpress-holder">
-			<input type="hidden" name="cp[storyline_order]" value="" />
-			<div id="storyline-sorter">
-				<div class="cp-children">
-					<?php
-						$this->_render_admin_storyline_tree(reset($storyline->get_simple_storyline()))
-					?>
-				</div>
-			</div>
-			<script type="text/javascript">Storyline.setup()</script>
-			<p><em><?php _e('(drag and drop desired order. categories can be modified on the Posts -> Categories page)', 'comicpress') ?></em></p>
+		<?php include('_storyline-order.inc') ?>
 
-			<input class="button-primary" type="submit" value="<?php _e('Submit Updated ComicPress Options', 'comicpress') ?>" />
-		</div>
-
-		<h3><?php _e('Comic Image Types', 'comicpress') ?></h3>
-		<div id="comicpress-image-types-holder" class="comicpress-holder">
-			<div id="image-type-container">
-				<?php foreach ($this->comicpress->comicpress_options['image_types'] as $type => $info) { ?>
-					<?php include('_image-type-editor.inc'); ?>
-				<?php } ?>
-			</div>
-			<a id="add-new-image-type" href="#">[+] Add a new image type</a>
-			<script type="text/javascript">ComicImageTypes.setup()</script>
-
-			<input class="button-primary" type="submit" value="<?php _e('Submit Updated ComicPress Options', 'comicpress') ?>" />
-		</div>
+		<?php include('_comic-image-types.inc') ?>
 
 		<h3><?php _e('Active Components', 'comicpress') ?></h3>
 		<div id="comicpress-active-components-holder" class="comicpress-holder">
diff --git a/test/ComicPressTest.php b/test/ComicPressTest.php
index b0979a9..5f34cfb 100644
--- a/test/ComicPressTest.php
+++ b/test/ComicPressTest.php
@@ -319,4 +319,50 @@ class ComicPressTest extends PHPUnit_Framework_TestCase {
 
   	$this->assertEquals($expected_result, $this->cp->get_default_image_type());
   }
+
+  function testInit() {
+  	$cp = $this->getMock('ComicPress', array('load', 'normalize_image_size_options', 'normalize_active_backends'));
+  	$cp->comicpress_options = array(
+  		'active_backends' => array('ComicPressBackendURLFactory')
+  	);
+
+  	$cp->expects($this->once())->method('load');
+  	$cp->expects($this->once())->method('normalize_image_size_options');
+
+  	$cp->expects($this->once())->method('normalize_active_backends')->will($this->returnValue(array(
+  		'ComicPressBackendURLFactory'
+  	)));
+
+		$cp->init();
+
+		$this->assertEquals(array(new ComicPressBackendURLFactory()), $cp->backends);
+  }
+
+  function providerTestNormalizeActiveBackends() {
+  	return array(
+  		array(
+  			array(), array('ComicPressBackendBadFactory'), array()
+  		),
+  		array(
+  			array('ComicPressBackendURLFactory'), array(), array()
+  		),
+  		array(
+  			array('ComicPressBackendURLFactory'), array('ComicPressBackendURLFactory'), array('ComicPressBackendURLFactory')
+  		),
+  	);
+  }
+
+  /**
+   * @dataProvider providerTestNormalizeActiveBackends
+   */
+  function testNormalizeActiveBackends($available_backends, $enabled_backends, $expected_backends) {
+  	$cp = $this->getMock('ComicPress', array('_get_declared_classes'));
+  	$cp->comicpress_options['active_backends'] = $enabled_backends;
+
+  	$cp->expects($this->once())->method('_get_declared_classes')->will($this->returnValue($available_backends));
+
+  	$cp->normalize_active_backends();
+
+  	$this->assertEquals($expected_backends, $cp->comicpress_options['active_backends']);
+  }
 }