White screen after logged in

[gamiR]

I have a dual boot system with windows xp SP2 and opensuse11.0 with GNOME.I tried to install ATI drivers from opensuse site using 1-click install.By that I downloaded ati.ymp which I installed using Yast Package handler.While Installation was in progress I aborted it because of less speed of downloading and restart the system.But now white coloured screen appear after openSUSE11 started.When I clicked mouse blindly any where on desktop banshee player started.Thus I think my display drivers crashed.What Should I do now? My important data also there.Please suggest some way to get back previous desktop.I tried this:
sax2 -r -m 0=radeon
then also problem remained unsolved.
I have opensuse11.0 bootable DVD.Will it help ?

[tecktalk]

Yes try to use the restore or repair option.. else.. boot from windows .. backup everything on the other drive and the format it with new one..

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[Jordan]

That is odd. Can you boot without enabling GUI mode?