Hm, I've managed to enable QE/CI using some tips from:http://forum.insanelymac.com/index.php?showtopic=70808&hl=x600&st=160
also used HP.ZD8000series.graphics.extensions, don't remember exacly where i did got it, for sure somewhere on www.insanelymac.com forums.

Bottom line. Xbench Results: 66.40
It seems like I need to buy a new computer and for sure it's going to be MBP.

cheers!

ps. can't stop repairing my leopard intall, even when university exam is coming up ( on monday :> ).