I've played with it again some more, and it seems the syslinux loader on the
system rescue cd seems to work just fine, and the system sees all 8GB ram
I have also not been able to get a manually compiled version of GRUB 0.99 to
boot. Everything I've tried only gives me 'Symbol not found:
grub_divmod64_full' error. I only had three drives installed, two of which I
grub-install'ed to, and the third doesn't even have a boot sector (raw XFS
filesystem directly on the drive). And I just tried unplugging all but one
500G drive that I grub-install'ed the new grub image to. Nothing works.