I tried to install B2G not too long ago on my laptop. It way exceeds the specs needed to run BG2 but I still get huge stuttering problems. I've heard this is due to having a dual-core processor. Will setting the executable to run on one core only fix this? I don't have the discs handy at the moment so I can't test this myself.
I had that same problem on my laptop, but disabling 3d acceleration in the video options seemed to fix it.
I found that for anyone of you having this problem.