Fedora :: Cannot Change Resolution To Above 640x480

I am running fedora 11 live cd on a work computer waiting on a new harddrive. Ran knoppix and Gos 3.1 fine. they start at 800x600 but can relatively easily be changed to much better but fedora likes this really low resolution on the monitor 640x480. In Gos I unhide screens and graphics and change it there but fedora doesn't seem to have this basic setting utility. Where is it in fedora or its equivilant. The basic monitor setting only offers the 1 option and even this box is not fully visible, ok and cancel are cut off at the bottom. Going back to Gos for now, though someone managed to crash it while surfing the net. mATX Via chipset p4m800 s3 unichrome graphics. linux loads vesa drivers instead of s3 unichrome drivers.