Toing

Sorry for the late reply.

Heres a list of settings in the IWD config:

General Tab:
System: All set to High End 700MHz

Game Tab:
Cache: 999MN

AI Framerate: 30

Path Search Nodes: 400000

EAX Off

Graphics Tab:
Resolution: 800x600

2D Colour Depth: 16-Bit

Fullscreen

2D BLT: All software BLTs turned on

3D OpenGL OFF

Game Options: All ON except Sprite Mirroring

Tile Pre-Cache: 100%

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With those settings above, Icewind Dale is playable, with only slight lag (slight as in its not silky smooth like it should be) with no freezes or stuttering.

As soon as any 3D effects are turned ON or any software BLTs are turned OFF, the game immediately starts lagging and freezing. Same goes for IWD2 and PST.