Here's a great software, that makes you able to play game with better resolution and in WIDESCREEN.
G3: Widescreen Mod
Also works with following (awesome) Infinity Engine games:
Baldur's Gate: Tales of the Sword Coast
Baldur's Gate II: Shadows of Amn (with or without Throne of Bhaal)
Icewind Dale: Heart of Winter
Icewind Dale II
Planescape: Torment