+1 I guess. Now that I think about it
I'm sorry, I don't mean to sound like an ass, but why not buy a new card? It's possible to find a modern card for $80 which will still blow your old card out of the waters. There's even a silent (fan-less) Radeon 5450 card there for $50.
Performance comparison of graphics cards for less than $100.
I think it's great that the old stuff still works in Linux (especially since a lot of people don't see any gain in switching), but is the hardware still relevant enough to support it when compared to newer hardware? I do agree that games shouldn't crash your system, but have you tried if it crashes with Catalyst drivers? Can you get a crash dump so you can send it to the devs and recreate the scenario?