jolrei: I have taught her to delete the accessories and groups cache cheat everytime she exits the game... can't remember if I actually deleted after uninstalling/reinstalling M&G.. will try that. Did nuke/fix everything on the lot debugger as one of the first things - also no dice.
I've skimmed the linked thread, but I'm still clueless as to deleting only dangling swafs, and considering her neighbourhood is highly populated, it's probably gonna be more timeconsuming, than just reinstalling... provided there are any dangling swafs anyway. It's not as though she really wants to keep that neighbourhood, right now she'll be happy to have any working neighbourhood.
So I'm gonna head off to her, start a fresh custom neighbourhood, with all the noregen hacks in + empty templates, make sure to delete the groups.cache and look in sim-pe for any swafs and delete those if there are any - and if this fails I guess I'm going to be spending the weekend uninstalling/reinstalling everything for her...