This has just made my week! A mod to (somehow) patch the game to run in a selection of resolutions.
Grab it here.
Just tried it on Planescape Torment and it looks AMAZING.
Can't wait to give Baldur's gate a try.
Note: It needs a bit of tweaking to get right. I found I had turn down the hardware acceleration to get the fog of war working correctly.
screeny: (full res one attached)