Its looks like Hexen 2 HUB system,now its working on PSP(DarkQuake) and PC(FitzQuake)
All good quake mods must have this thing,really.
Original thread is here:
someone can find my post's with fixes for PC in this thread
I think about big engine(modified DQ) with FrikFile,HUB system,etc.With documentation.
But its not actual at the moment.