I've had problems like this with my ATI/Radeon 9000 Pro
Even though it came with drivers to use for Windows 98, it did not seem to support it properly.
I moved on to XP and it worked like a dream. The nightmares just came after getting used to XP.
![Wink ;)](https://www.computerhope.com/forum/Smileys/classic/wink.gif)
Maybe the resolution is too high to work with, try setting the resolution to 640x320 or 800x600 in safemode and see if that helps.
I don't think I can be of anymore use.