FET (MOSFET): http://en.wikipedia.org/wiki/Mosfet
Gate resistors seems to be ok, but I would recommend checking them again with all 6 power supply mosfets unsoldered.
If you post a closer pic of an area around output FET's 1 and 2 (top, which are blown), I'll mark the resistors.
It will be easier to unsolder FET's by cutting them from leads, and unsoldering each lead separately. It is always better to use desoldering tool like Radioshack's
http://en.wikipedia.org/wiki/Desoldering
Use heat sink compound on new FET's surface, like the stuff used for CPU's, Dow Corning 340 or something.
Remember to never turn on repaired amp without a current limiter inline with it (headlight bulb, etc.), or you can blow new stuff very easy.

 

okay I checked 8 of the big green output resistors. all of them but the TOP 1 and 2 read around 1.0 ohms. Im about to put up a close up of output FET's so you can mark the other resistors in need of checking. Also, I won't hooking this up till its completely repaired so before then I need to find a place to hook up a headlight bulb in-line with the circuitry.