Windows 2000 fails to load after installing graphics driver

[droidinthevoid]

I have installed Windows 2000 Professional SP4 on my Dell Latitude D620. This laptop is known for failing to boot to begin with, as I described here when running its native XP (I was locked out of this account). However, the steps to solve my boot issues also work for 2000.

Everything worked as intended until I installed the graphics driver. Now, as soon as the PC gets past the colourful bootscreen, it either reboots or stays powered on with the screen turned off (not black, fully turned off) and no disk activity. Dell lists Windows 2000 as a supported system here, including the graphics driver, so there is no reason for it not to work. The laptop is powered by an Intel 945GM controller.