Hi

This topic was covered fairly well on "TRUCKs!" on the TV show.
Here is the episode:

http://www.powerblocktv.com/site3/index.php/trucks-episodes?ep_num=TK2010-09&ep_sea=1001

You can also download the video on iTunes for $1.99.

Shows how to convert 3 to 5 window using the replacement panels. Process should be fairly similar whether using cut out used ones or the new replacements.

mike