Hi,
When you captured Access 2010 did you do it on a clean machine?
From memory it only worked for me when I installed the rest of the Office 2010 suite on the capture machine before starting the capture, then captured the changes after adding Access.
I also followed the steps in the documentation pointed to by the previous posters.
I found it really frustrating getting the Office 2010 apps working with ThinApp, but I was able to get Access, Project, and Visio working eventually.
-Johnny