Wheee! We're linux zealots - why answer a technical question when we can talk about Iraq instead?
@zayened - You're bumping into a general linux problem that can be awfully confusing to newbies - the existence of parallel code branches. Lots of projects in linux, especially ones that relate to the kernel, have a main branch that's pretty easy to deal with as well as a more up-to-date branch that takes a lot more work. Generally, try the old version first before doing a lot of extra work.
DRI is one such project, and the stuff you're reading describes the installation of the newest DRI drivers. Since the card you've got is pretty mature, I don't think those should be necessary. This makes your life simpler. I could be wrong of course...
In order for DRI to work, you need three things:
1) A kernel driver loaded at boot time (or, at least, before X starts). Two kernel drivers, actually - agpgart for the mobo AGP support, and radeon for the vid card support. Do a su to root, then lsmod. If you see those two listed, you're cool. If not, add them to /etc/modules (as root, open that file in a text editor and add those two module names - if you don't know how to do that, do some googling). Then reboot, and do the lsmod again to check it out.
2) An XFree86 driver that works with the above kernel drivers. This part is probably taken care of, but you can check by opening /etc/X11/XF86Config (or XF86Config-4, or X-org.conf - do an ls /etc/X11 and pick the one that looks right). In the "Device" section, there should be a "Driver "radeon"" line. If not, change whatever driver is there to radeon instead.
3) A section of the above config file that tells the system to use DRI. At the top of the file, there should be a bunch of "Load" lines in the "Module" section. Make sure that there a line for each of "glx" and "dri". At the bottom of the file, you need a separate section (which may already exist), that says
Section "DRI"
Mode 0666
EndSection
Restart the X server (or the system) after making those changes.
Those steps should set you up with main branch of DRI support. You can check by doing glxinfo (maybe as root) and looking for a line that says something like "Direct Rendering: yes".
edit: In fact, I'd run that glxinfo before you start - SuSE really should have done this already.
edit again: In case it wasn't clear - you should not have to install anything. All the software you need for the main branch of DRI is already on your system.