Dack,
You are saying: Boot in safe mode. The problem is that I cannot boot in safe mode for the same reason that I cannot boot in normal mode. (To be exact it does boot but the graphics are screwed up, meaning that I see everyting 6 times on the screen). The only way I can boot is really VGA mode, which gives me 640*480 (refresh rate 60Hz).
So I will have to do something in VGA mode to make sure that the PC will boot in Normal mode using 640*480. I don't know if this is possible.
The only solution that I can think of is to temporarily connect to a better monitor, change the resolution to 640*480 and then connect back to the 15" that I am using now. The problem is that I don't have a better monitor here to do this with.
Joep