I understand. Possible but complicated and time consuming. I do love the mod, I want to preface any criticism with that. I love the goblins, hobgoblins, orcs, redcaps, wererabbits, minotaurs, and horse girls. The many races added are a great gameplay addition that fit so well with the base game, but the time I had to spend to even get some of them at the low percentages was disappointing and almost made it not worth the effort. I had moved all my other races to the private manor while I worked on getting a devil to spawn. There were 30-40 slave cages filled with angels before I got even one devil and then it was locked as a loli. I won't lie, I felt disappointed. When looking at the Dragon spawn rate, Vampire spawn rate, and Kitsune spawn rate, I just didn't have it in me.
Additionally I had an issue with increasing the devil's chest size. Basically, once it went beyond a certain point (large to huge, IIRC) it broke its value to say "0/0" which also caused my pixies to stop working and I needed to reload a save file from before I even got the devil. This left a huge pit in my stomach and really made me not want to do the grind again. The reason for my initial post about a cheat tool or something of that effect. I certainly wouldn't blame you if you didn't want to put in that amount of time, though. I just wanted to share my thoughts.