Forum Moderators: phranque
If it is a video driver problem - which is what it sounds like - and you know the driver for your video card then you can temporarily rename it so the system has no driver (I believe the driver files are .vxd). This should allow you to boot into safe mode at which point you should re-install the driver.
If safe mode still doesn't work, you should see if you can get a copy of the basic 640X480 driver used by safe-mode (a visit to MS Knowledge base and a bit of searching should yield you the driver file name). Acquire this driver file and copy it to the floppy disk and then to the video driver dir and try to boot into safe-mode again.
If you still can't get in - I'm about of ideas and I'd do a re-install.
Of course all of these require that you have a Win2K CD or disk set. If you don't - then I'm afraid you're in deep doo doo. :(