Shambler Should Know Everything About This.
Some hackers are doing full SP episode for Daikatana http://www.moddb.com/games/openkatana
So... perhaps they know how to setup mapping tools for DK. I dunno, you could ask them.
Hogsy on InsideQC might know, he's working on OpenKatana and posts updates there. Let me know if you want to register an account.
TB2 supports daiakatna in the form of an fgd file