I found these goodies all over. The Snake Eater .mp3 can be found on Soulseek. If you don't have Soulseek and you want it, IM me at Fuzz Bombshell and I'll send it directly to your computer.
I used to hate this song because it was so campy, but now I'm starting to really love it. I don't know if it's because I'm remembering what happened in the game, or the ending, but I love this song now.
I'm still looking for the main theme .MP3, if anyone knows where that is. I don't know if they've released the soundtrack for it yet, but I'd like to know. ;o
Also, as a treat to all of you, I found a .WMV of Ocelot's meow.
Enjoy.