Index: app/models/attachment.rb
===================================================================
--- app/models/attachment.rb	(revision 141)
+++ app/models/attachment.rb	(working copy)
@@ -1,6 +1,6 @@
 class Attachment < ActiveRecord::Base
   
-  ATTACHMENT_DIR = "#{RADIANT_ROOT}/db/attachments"
+  ATTACHMENT_DIR = "#{RAILS_ROOT}/db/attachments"
   
   belongs_to :created_by, :class_name => 'User', :foreign_key => 'created_by'
   belongs_to :updated_by, :class_name => 'User', :foreign_key => 'updated_by'
Index: lib/part_attachments/site_controller_extension.rb
===================================================================
--- lib/part_attachments/site_controller_extension.rb	(revision 141)
+++ lib/part_attachments/site_controller_extension.rb	(working copy)
@@ -51,7 +51,7 @@
       @page = Page.find_by_url(params[:page_url], live?)
       @attachment = @page.attachments.find(:first, :conditions => ['filename = ?', params[:attachment_id]]) unless @page.nil?
       if(@attachment)
-        response.headers['Last-Modified'] = Time.now.rfc2822
+        response.headers['Last-Modified'] = @attachment.updated_at.rfc2822
         show_uncached_attachment(@attachment)
         @cache.cache_response(url, response) if live? and @page and @page.cache?
       else
Index: lib/attachment_tags.rb
===================================================================
--- lib/attachment_tags.rb	(revision 141)
+++ lib/attachment_tags.rb	(working copy)
@@ -9,7 +9,12 @@
   # Returns an Attachment found by either the Attachment Name or Id.
   # To do: an attachments:each tag, using tags or categories. 
   #
+  desc %{
+    <r:attachment name="[name]" id="[id]">...</r:attachment>
     
+    Returns an Attachment found by either the Attachment Name or Id.
+    To do: an attachments:each tag, using tags or categories.
+  }
   tag "attachment" do |tag|
     attachment = find_attachment_by_attrs(tag) 
     raise TagError.new("Attachment cannot be found") unless attachment
@@ -25,7 +30,14 @@
   # the original image will be used. This attribute only works for images, not other content types. Otherwise it is
   # ignored. To do: Title, Rel, Class for styling and using with Lightbox and other Javascript galleries. 
   #
+  desc %{
+    <r:attachment_url size="[size]" />
   
+    Returns the URL of the attachment. Use the "size" attribute to define an image size,
+    such as "icon", "thumbnail", "normal". These only work if RMagick is installed. If no size is defined,
+    the original image will be used. This attribute only works for images, not other content types. Otherwise it is
+    ignored. To do: Title, Rel, Class for styling and using with Lightbox and other Javascript galleries.
+  }
   tag "attachment_url" do |tag|
     attachment = find_attachment_by_attrs(tag) || tag.locals.attachment 
     attachment.url(tag.attr['transform']||'default')
@@ -35,6 +47,9 @@
   # <r:attachment:title />  Returns the title of the attachment
   #
   
+  desc %{
+    <r:attachment:title />  Returns the title of the attachment
+  }
   tag "attachment:title" do |tag|
     attachment = tag.locals.attachment
     attachment.title
@@ -46,7 +61,12 @@
   # Returns an img tag of the image in the size given. An alt attribute is also 
   # provided and remains empty if none is given. To do: Class and ID for CSS styling.
   # 
+  desc %{
+    <r:image size="[size]" alt="[alt]" />
   
+    Returns an img tag of the image in the size given. An alt attribute is also
+    provided and remains empty if none is given. To do: Class and ID for CSS styling.
+  }
   tag "image" do |tag|
     attachment = find_attachment_by_attrs(tag) || tag.locals.attachment 
     raise TagError.new("Attachment `#{tag.attr['name']}' not found") unless attachment
@@ -105,6 +125,14 @@
   # provided and remains empty if none is given. To do: Class and ID for CSS styling.
   #
   
+  desc %{
+    <r:thumbnail size="[size]" link="[boolean]" />
+
+    Returns an img tag of the image as a thumbnail. It also adds a link to the larger image
+    the size attribute refers to the linked image, not the thumbnail.
+    An alt attribute is also
+    provided and remains empty if none is given. To do: Class and ID for CSS styling.
+  }
   tag "thumbnail" do |tag|
     attachment = tag.locals.attachment
     attachment = find_attachment_by_attrs(tag) unless attachment 
@@ -119,10 +147,10 @@
     size = size.to_sym if size
     alt = tag.attr['alt']
     if link
-      url = attachment.url(transform)
-      %{<a href="#{url}"><img alt="#{alt}" src="#{attachment.public_filename(:thumbnail)}" /></a>}
+      url = attachment.url(tag.attr['transform'])
+      %{<a href="#{url}"><img alt="#{alt}" src="#{attachment.url(tag.attr['thumbnail_transform']||:thumbnail)}" /></a>}
     else
-      %{<img alt="#{alt}" src="#{attachment.public_filename(:thumbnail)}" />}
+      %{<img alt="#{alt}" src="#{attachment.url(tag.attr['thumbnail_transform']||:thumbnail)}" />}
     end
   end
   
@@ -131,7 +159,11 @@
   # 
   # Returns the content type of an image. Just used for diagnostics. 
   #
+  desc %{
+    <r:attachment_type />
   
+    Returns the content type of an image. Just used for diagnostics.
+  }
   tag "attachment_type" do |tag|
     attachment = tag.locals.attachment
     attachment.content_type