I've gone ahead and done a mod implementation that will pretty much make the question of the number of pictures in a random girls folder moot. I've taken dqhx's mod which has each random girl pick a profile picture and stick with it, and added it to my mod.
With this change, I've reevaluated the rules I've put in place for random girls, so just ignore that prior post by me. We can have fewer random girl folders now, and still have more unique looking girls. She's still going to dye her hair for every sex act, but at least you'll still be able to identify her by her profile picture.
I've also added his interaction picture mod. Now, once I get off my lazy keister and get some random girls worked out, I can release this mod.