Video card driver
Although the SuSE box says support for Radeon 9000 (or nVidia GeForce, etc) it doesn't have the 3D accelerated driver. It is just a basic Vesa2 driver. To have the 3D accel. driver you must fetch it from the manufacturer's website. Get the latest driver!
As for monitor I have a similar problem, i.e. not supported (not on the lists) but it works. I just need to enter vertical and horizontal refresh rate and screen XY dimensions (I use ruler for this :-) to further optimize it. After that Sax2 is able to reconfigure the resolutions and colors. So I don't have to buy a new monitor ;-)
As for printer, well, there is no hope if it not listed in linuxprinting.org :-(