I think you're all missing the point. VMware is quite capable of playing a good number of old games -- we're talking about two mostly 2D games from many years ago, not the latest and greatest FPS. In fact, for one old PC game I tried (Majesty), I was able to get it to work perfectly in VMware, but could NOT get it to work natively in Boot Camp using the same partition.
So, to try to answer the OP's question, I'd first make sure that you're running the latest version of VMware (at least 2.something, they have much better video support). Also make sure that 3D acceleration is enabled in the virtual machine preferences.