Man oh man, 10 hours go by, two bathroom breaks, no food, 5 bottles of Bawls, and I'm not even finished yet.
Quick thanks to Cam for all the advice though.
I bought about 100 square feet of eDead v1SE. Sticky stuff, worked really well, even in the terrible cold winter weather. It even rained a few times throughout the day. When I began, I had no idea what I was really doing. And just started sticking pieces to the car and spent a lot of time flattening it out. By the end, I was pro at avoiding the holes that I covered up a few other times.
After every installation of a new part of the car, I took the car for a drive around the block and listened for differences. Instead of laying eDead on the ground, I bought some of the insulation for water heaters, quieted the car up quite a bit. The only thing I didn't fix was the bouncyness. My car is like a plush carpet right now... without the plush carpetting. But that's something I'll deal with for now.
Basically I did, trunk lid, spare tire wheel well, bottom of the rear seats with eDead, floors, and all 4 door panels. And I still have some eDead left (I'm curious why...), but for now I'm pretty satsified.
The only noise I hear right now is from the engine, which I'm wondering if there is a way to kill. I didn't run into nightmare problems like accidentally covering up my whole windshield or putting the matting over cables or anything. Everything went pretty smooth. Just lots of time and effort put into it.
I don't remember why I started this. So for now...
eDead v1SE
Should get my v3 next week so I can do my roof and the pillars.