I need to update this TR, but I am planning to do so with Snap Creator 4.0 which should be released in early April.
As of Snap Creator 3.6 there is an action in Snap Creator called custom that allows you to perform restore operations outside of Snap Creator's normal workflow.
With this action you are able to perform single file restores, but there are a few manual steps that must be taken along the way.
This information is covered in the Installation and Administration Guide for Snap Creator - I believe that the section is titled Single File Restore in a SAN environment.
There is also a video available that walks you through the steps: http://www.youtube.com/watch?v=_1F7MHpaLTY
The video is about 11.5 minutes long - if only covers this one topic.
Other videos are available on the same YouTube channel: http://www.youtube.com/SnapCreatorTV
Hope this helps!