Is that, by chance, a T500 with the T60 keyboard swap? I ran with one of those for some time, before the lack of graphics horsepower (I think it had a Radeon 3650?) ultimately did me in.

If you're looking for another cool upgrade, I also did a 1920x1200 screen upgrade on mine. I wasn't able to find a Lenovo-native part, but I did find a pin-compatible screen out of a Dell mobile workstation that fit mostly perfectly, after sawing off some tabs with a Dremel.