Apparently, according to the modders that did this, it didn't even take long for them to do it, a couple of hours. And as someone who has checked it out, it actually looks completely fine ingame. Sure, some hats look really bad, but alot of them look absolutely ok for playthrough. I think they don´t want to release it because of quality (since the earhairs clip through since there are no natural holes in the hats for the ears).
