I've already followed a number of tutorials on this iste regarding ATI video cards installation and no luck...

I can't even compile the required fglrx modules:
when I execute /lib/modules/fglrx/build_mod/make.sh I get

----
initializing...
Error:
kernel includes at /lib/modules/2.4.20-4GB-athlon/build/include do not match current kernel.
they are versioned as "2.4.20-4GB"
instead of "2.4.20-4GB-athlon".
you might need to adjust your symlinks:
- /usr/include
- /usr/src/linux
---

and when I change the kernel version in /usr/src/linux/include/linux/version.h
to match my current running kernel version and re-run make.sh I get:

----------
initializing...
Error: the ip-library is present as some file - thats odd!
----------

If anyone managed to get ATI+ Asus nforce + SuSE working together I would really appreciate a step-by-step instructions..
Or should I change distro?
Please help me! I would hate to be forced to go back to windoze world

I assume you installed the 2.4.20-4GB kernel sources before compiling the ATI fglrx driver. Also try changing the the Makefile in /usr/src/linux look for line that says EXTRAVERSION and change it to 2.4.20-4GB-athlon.

But it would be better if you would just get the 2.4.20 kernel source and install 2.4.20 and then try the ATI driver.You will need to patch 2.4.20 with Nvidia_nforce agpgart.diff patch at http://www.nvidia.com/object/linux_nforce_1.0-0261 which you will find in NVIDIA_nforce-1.0-0261.tar.gz. Should get you 3D working.