diff -urNp img_assist/img_assist.css img_assist.patched/img_assist.css
--- img_assist/img_assist.css	2006-05-04 14:35:40.000000000 -0700
+++ img_assist.patched/img_assist.css	2006-11-28 09:18:50.000000000 -0800
@@ -118,9 +118,14 @@ span.right {
   float: right;
   margin: 5px 0px 5px 5px;
 }
+span.center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
 span.caption {
   display: block; /* put the caption under the image (not next to it) */
 }
 .inline img{
   border: 1px solid #000; /* put a thin border around inline images */
-}
\ No newline at end of file
+}
diff -urNp img_assist/img_assist.module img_assist.patched/img_assist.module
--- img_assist/img_assist.module	2006-06-16 10:33:15.000000000 -0700
+++ img_assist.patched/img_assist.module	2006-11-28 09:26:37.000000000 -0800
@@ -87,7 +87,7 @@ function img_assist_menu($may_cache) {
  * Implementation of hook_perm().
  */
 function img_assist_perm() {
-  return array('access img_assist', 'access all images', 'access advanced options');
+  return array('access img_assist', 'access all images', 'access advanced options', 'use original size');
 }
 
 /**
@@ -725,6 +725,7 @@ function img_assist_properties() {
     $node->title = str_replace("\n", ' ', trim($node->title));
     $node->body = str_replace("\r", ' ', strip_tags($node->body));
     $node->body = str_replace("\n", ' ', trim($node->body));
+    $image_info = image_get_info(file_create_path($node->images['_original']));
 
     // Select (or generate) a preview image
     $img_assist_create_derivatives = variable_get('img_assist_create_derivatives', array());
@@ -769,6 +770,13 @@ function img_assist_properties() {
       }
     }
 
+    // Add a choice for 'original' if it's within the maximum size and user has proper permission
+    if (user_access('use original size')) {
+      if ($image_info['width'] <= $max_size[0] && $image_info['height'] <= $max_size[1]) {
+        $derivatives[$image_info['width']  .'x' . $image_info['height']] = t('original');
+      }
+    }
+
     // Add a choice for 'other' if the user has the proper permission to create custom sizes
     if ($img_assist_create_derivatives['custom_advanced'] && user_access('access advanced options')) {
       $derivatives['other'] = t('other');
@@ -823,7 +831,7 @@ function img_assist_properties() {
     // Size
     $form[] = array('#value'=>"</td></tr><tr><td width=\"90%\">\n");
     $form[] = array('#value'=>"<div class=\"form-item\" id=\"size\">\n");
-    $form[] = array('#value'=>"<label for=\"edit-size\">Size:</label>\n");
+    $form[] = array('#value'=>"<label for=\"edit-size\">Size: (orig " . $image_info['width'] . 'x' . $image_info['height'] . ", max " . variable_get('img_assist_max_size', '640x640') . ")</label>\n");
     $form['size_label'] = array(
       '#type' => 'select',
       '#default_value' => variable_get('img_assist_default_label', '100x100'),
@@ -854,7 +862,7 @@ function img_assist_properties() {
       '#type' => 'select',
       '#title' => t('Alignment'),
       '#default_value' => variable_get('img_assist_default_alignment', 'left'),
-      '#options' => array('left'=>'left', 'right'=>'right'),
+      '#options' => array('left'=>'left', 'right'=>'right', 'none'=>'none', 'center'=>'center'),
       '#prefix' => '<span id="alignment">',
       '#suffix' => '</span>'
     );
@@ -1262,7 +1270,11 @@ function theme_img_assist_inline($node, 
   $node->title = strip_tags($caption); // change the node title because img_assist_display() uses the node title for alt and title
   $img_tag = img_assist_display($node, $size);
 
-  $output  = "<span class=\"inline {$attributes['align']}\">";
+  if ( $attributes['align'] == "center" ) {
+    $output = "<span class=\"inline {$attributes['align']}\" style=\"width: {$attributes['width']}px;\">";
+  } else {
+    $output  = "<span class=\"inline {$attributes['align']}\">";
+  }
   $link = explode(',', $attributes['link']);
 
   if ($link[0] == 'node') {
@@ -1648,4 +1660,4 @@ function theme_img_assist_legacy() {
 	return "<div class=\"%image-class\">\n  <a href=\"%node-link\"><img src=\"%src\" width=\"%width\" height=\"%height\" alt=\"%alt\" /></a>\n  <div class=\"caption\">%caption</div>\n</div>";
 }
 
-?>
\ No newline at end of file
+?>