Can't find YaST

Hi. I've downloaded the RPMs from SuSE to upgrade KDE to 3.2 from the 3.14 that ships with SuSE 9.0. I cannot finish installing the .RPMs as once I installed kdebase3 and removed old konqueror, kate, etc KDE 3.2 lost YaST as default installer for .rpm files. Anyone know the x app to call for YaST2? It appeared to be /sbin/YaST2 but it isn't working. I get the prompt to enter admin password, but nothing happens from then on. Alternatively, does anyone know the shell syntax for rpm to remove old conflicting copies as well as to install the new apps, etc? I am using rpm -ivh <file>.rpm it tells me the conflicting files but then bombs. Thanks Mike