problems with Hexen 2 Mission Pack under Windows XP

[Defender 0]

I´ve got a problem running the Hexen 2 Mission Pack (Portal of Praevus) under WinXP. While Hexen 2 itself works all fine after deleting opengl32.dll, the mission pack mixes up the polygons of the weapons.

 

Instead of the weapons you just see a bunch of colored shapes.