> I'm really greatful for the help!
>
> OK, I've trimmed down what I don't. Now what programs exist to fix checksums, or
> a site for patches?

I don't know of any programs to correct checksums (I'm sure there are, I just don't know of any off the top of my head).

You could just use KGen with it's AutoFix Checksums option:

AutoFix Checksums - Fixes Checksums on ROMs with bad checksums. Some ROMs
are *supposed* to have a bad chacksum, and fixing it will stop the game
from running. In either case, if your game locks up (often with a red
screen) try altering this option and reloading the ROM.