Going to assume you have now mastered editing your config files.
In your user.config.dat file, you can insert the command to unlock them all. There are six types. SCW is the native images -created by the dev. The others are created by game users/fans.
Myself, I only use four types (and will likely reduce this even further in the future). These two lines are in my user.config.dat file, with the # left in place to remind me what is available. The line
without the hashtag is the one that does the work. You could restrict it to just SCW, like the native config.dat file does, but any other types you leave in will add more.
I have chosen these four because they are more photographic than art. In there, I realize some actual porn actresses are borrowed from. I have no idea who they are, porn is not my world. Games are another realm.
#image_modules string scw,ccw,nyb,exp,gar,lfm (remove the # to unlock all at once)
image_modules string scw,nyb,exp,gar