[lubuntu] rolling back ati drivers

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http://ubuntuforums.org – Hi, I installed RadeonDriver and after reboot (after POST) I see only black screen. I can access a terminal with ctrl+alt+f1 but i can't run LXDE. So my question is how can I rollback drivers to VESA or which ever driver do you recommend for ATI X200 (its an old laptop) ? Also i don't care about 3D graphics I use that lap just for browsing. Thanks in advance, John edit: I use Lubuntu 10.04 Lucid Lynx (Hardware)