Some ideas here, for gooping up the back with different stuff:
http://www.boated.com/forum/topic.asp?TOPIC_ID=129110
But I just replaced the carpet, make sure the new stuff has the light colored backing with horizonatal lines, not the black honeycomb stuff. I used these guys, great work and not much money.
Ship Shape Marineworks LLC
26 Waterford Place
Gilford, NH 03249
603-528-7769