I’m running Vista and needed Windows 2000 so that Quickbooks 2004 would work. I didn’t want to upgrade to QB2005 because I would need Vista.
So I did some research I found this website
And found a graphics emulation card for Win2000.
Inside Windows 2000 guest I linked the graphics card device to the driver. Did a reboot, and now get more the 16 colors and higher than 800×600 resolution.