There is a video tutorial available which shows how to update a VSTA project template to mimic the ShapeApp sample templates which use a post build event to move add-in assemblies to %My Documents%\ShapeAppCSharp\AppAddIns.  Methods covered include manually updating the template, using Visual Studio to update the template, and how to manually register the updated template.  This tutorial can be used for both VSTA v 1 and v 2.

Click here to go to the download page for Updating VSTA Project Templates Tutorial.

Click here to view the video without downloading it.

Please feel free to leave any feedback or request a topic to be covered in this manner.

BTW- The sound levels are a little off, they'll be better moving forward.