QUOTE(bobthecow @ May 19 2008, 09:53 PM)
best way that i have found to do this is to glue the middle with some good adhesive and to use industrial strength velcro on the outsides. this way, if you ever wanna take it off, you can easily remove from the outside inwards.
This is the smart way. :)
Whenever you do ANY custom work, interior, audio, carpet, upholstery, etc... always, and I mean ALWAYS allow yourself some type of access for troubleshooting things in the future. If you carpet the walls, either build in small hidden access panels that aren't visible or use velcro in some areas as suggested above. This will prevent a big headache down the road when you need to replace something or add something new.