I have an nvidia 6200. Apparently, many NV43 A2s are disabled 6600s. Powerstrip says it's a version A2. Via nvflash I've saved the current image, but it won't load the 6600gt image; it says error reading file. (I can't for the life of me find a regular 6600 image). Another one it tries to load but says back checksum, wrong gpu - so I guess that one would work if I had a 6600GT.....
Also, powerstrip says there's 257mb of memory available. Of course Windows only reports 128. ??