As you can read in one of my previous post, changin installation sources, now you can upgrade to Kde 3.4 directly via yast.
Go to Yast control center, then choose ‘Install/Remove packages’. In the new loaded panel choose ‘packet groups’ from the drop-down menu and then ‘zzz.All’ from left frame. Click with right button on right frame and hit ‘all in this list->update if a new version is available’.
well done… enjoy your new Kde desktop!