Hang on a minute. AE uses the GPU for very little. For most tasks, that GPU is just fine.
For the ray-traced renderer it might not work (although you could try ticking the "use unsupported cards" box in the options and it would probably still work for it), but the ray-traced renderer is an obsolete feature so I wouldn't even worry about it.
The GPU-accelerated effects in the latest version of AE will probably work on that card just fine too.
But I found a video from this guy, JMS2772, on YouTube and I was up and running in minutes. Short and sweet instructions on what to do.
You don't have to do that hack anymore. AE has a little tick box to use "unsupported" cards. There is no need to go into the approved cards text file.
Also, the ray-traced renderer that this trick is referencing is considered obsolete, so unless you're using that, this whole discussion is irrelevant.