Updating to KDE2.1

Greetings, I've downloaded the KDE21 rpms from /pub/mirrors/kde/stable/2.1/distribution/rpm/SuSE/7.1-i386 and would like to update the installed version that came with SuSE7.1. Is there a proper proceedure/sequence to update the packages? My first attempt ended up in an unstable KDE that either locks up or crashes. Any pointers here is very much appreciated. Thanks a lot in adv.