I was having the same problem a few years ago. If i kicked a ROM-file with BlizKick into memory, first boot would be ok but reset = red screen. I solved it by replacing the ROM-file with 'BlizKick *' so it just copies the onboard roms into memory (with modules ofcourse). It maybe a buggy PPC-card we have, because it worked earlier with the previous BlizKick-setup.