I have just posted my module The Labyrinth that was from NWCon 5 in the NWN Vault for everyone to DL and play or check out how things are done and made.
I was looking at the guidelines and there would be some things that would not conform to the guidelines as far as interior areas, naming of stuff and I used some tilesets from the CEP ver 2.2
Too much stuff to redo, I would submit it if I could give it as is.