If you don't already have it, the latest
modding manual has probably 99% of the info you'll need for this mod. I also strongly recommend you make a copy of the .dm file for CBM1.92 and tinker with it if you haven't modded before, just to get a feel for what does and doesn't work. Modding Dom3 is surprisingly easy for most things but requires exacting attention to detail. And for everything that isn't easy, it's almost completely impossible.