Seeing how you mention the PS2 versions, have you tried Baldur's Gate on the PC? BG2 is a massive game and the mod scene for Baldur's Gate is pretty huge.
The Gibberlings Three and
Baldur's Gate II: Westley Weimer's Mods are the biggest I think but there's tons of others about.
Some clever chaps even made a mod to let you import BG1 into BG2 so you can use the improved BG2 engine and enjoy one huge ass run-through of all the games and expansions.
Then there's custom NPCs a plenty and tons of new scenarios floating about on the interwebs, not to mention the other Infinity Engine games like Icewind Dale and Planescape Torment. (Which they're also trying to port into BG2 engine).
Best of all they're all old so any new machine can run them no worries.