Actually the crazy mod is compatible with the regular game's girl packs. Just not the ones made for EX. The EX girl packs can be easily converted though by just removing the stuff he added.
So far, the only thing extra you can add to a girls file in the crazy mod is OralSex as a skill. And this is optional. (At least that is the only one I know of).
For pictures you have some new options for crazy mod, but not all are fully worked out yet. Still if you want we now have the option to create pics for Nude, Strip, Ecchi, Oral, Mast, Maid, Sing, Wait, Card, and Bunny. Each of these pics will show for certain jobs.. but they are not totally required. If you don't have a specific pic, the game will chose one from a different category
With Nude, Strip, and Ecchi ... these three are more or less the same (nude non-sex pics) but as usual, different ones show up for different jobs. and in the next patch, if you use any of the three, it will work for all jobs that use any of those types if you are missing pics. So once again, no big deal if you are missing them. The idea is that adding those pics will enhance game play.
Hope this helps!
--PP