How to get out of metacity?

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http://forums.opensuse.org – I'm still having a lot of difficulties with 11.2 KDE. None of the video players work properly (and I've installed quite a few in hopes of lucking up on one that'll work); OOo kept crashing, so I uninstalled it and installed Abiword -- it kept crashing too. So I tried to install the Gnome desktop with hopes that it would work better. But it doesn't show up anywhere! The login "station" when you all boot doesn't happen on my 11.2 -- the system would bypass that (but wants root verification for every little thing else); so I never got the chance to select a Gnome session. But at some point, it occurred to me that maybe if I just logged out instead of restarting, maybe it would take me to a login "station" (I don't know what the actual term for it is) where I could choose Gnome. Well logging out did take me to a login station, and there was a session menu -- but no Gnome option. So I chose Metacity; somehow, I associated that with Gnome. I logged in and it took me to a blue screen with nothing else on it. I had to do a hard reboot to get out. I've tried all the listed boot options, but I always end up back at the blank (now black) screen with nothing but a mouse pointer on it. I even used a failsafe pae boot option to get to a red prompt and entered zypper dup in hopes that maybe when it got done the system would boot to KDE. No luck there. What to do now. Presently, I'm using PCLinuxOS to post this. Any help will be much appreciated. What would be the Zypper command to install a Gnome desktop? (Distributions)