Okay, I have a clean install of NWN, both expansions, patched to 1.69. When I try to install into  any of the OC content (I want to play the two expansions with a PrC character), the installer unpacks, and then throws out the following error message:

"A warning has occured:

File: d:/nwn_xp2_final/dev/libsource/exobase/exofileinternal.cpp

Line #: 605

Programmer says: CExoFileInternal::CExoFileInternal() Filename passed contains an undefined alias."

This hangs the install and calls a debug offer from c++. The compiler then crashes.

I've gone over the manual, and the fact that it's the OC content (not that I've tried installing into anything else) giving trouble on a clean install tells me that it's probably me doing something elementary wrong, but I have no idea where to start troubleshooting.

HALP.