In my case I have a thinkpad t420 (not sure if I've mentioned this already) with the optional Nvidia card. The hd3000 runs cooler and seems to do everything I want it to almost as well as the Nvidia. So I just use the Intel.
Overwriting the OpenGL drivers is a new thing? That seems like odd timing... now that Intell gpu's are finally capable of something other than MSpaint.