The problem is probably (so I believe) occuring not because they're premade, but because they're already moved in (so, while I didn't try it, I presume that moving in premade families from sim bin shouldn't be a problem). I've tried removing AwesomeMod and deleting the cache and I could load premade families. I now reinstalled AwesomeMod since I don't really load premade families anyways, and if I really have to, I can still remove the mod to load the family, save, quit, reinstall AwesomeMod and play the save game (which works fine), but I figured I'd still point out the problem

I have no CC in my game but AwesomeMod & some sliders, and I have all EPs. Everything works fine, but one thing. Whenever I create a new game and try to play one of pre-made families (it doesn't matter which world I play, and they're all EA worlds, or which family), when I click on the house and the play button, it grays out the buttons (to go back to family choice or play the selected family), but the family doesn't open. The menu to save, edit town, go to menu, etc. is still clickable. I tried going to edit town and change active household, but the same happens. Moving in freshly made families and playing them works just fine, so this is the only problem I have encountered.