Well, i've gotten it to run once
under linux, but i was an idiot and I didn't document the steps i took to get it to work...
...but it can be done... at it actually works really well.
The route i used was to download and install nwwine , which is a wine implamentation tweeked for the Neverwinter Nights toolset. You will have to get the toolset.exe from a windows install that has been patched to version 1.30.
I'm using nwwine-20020703 and I cant even get the toolset started... something to do with MSS32.DLL.
anyway, here are some links :
If you figure it out, post here.