I used the
OmegaDrivers in my now defunct eMachines M6805 for its dedicated ATI Radeon Mobility 9600 (64MB of VRAM). They definitely made a large difference in the few games I played like SW Kotor/Kotor 2 and City of Heroes/Villains. Of course, a better card in that machine would have made it even better

Shame the mobo/videocard in the machine bought it, but with luck, my E1505 should arrive this evening.