
This is already done. But previously it was for my own private use and therefore a little kludgy, so I'm just making it nice and fixing it up.
I told Spirit I'd finish and release this.
I used it to convert the entire Nexuiz WAD set to both Quake and Half-Life formats.
http://www.quake-1.com/files/developer/ ... e_wads.zip
(The above is older Nexuiz, maybe 2-3 versions ago. 2008 or 2007 ish).