I was able to change people's clothing but I'm still getting crashes, mostly when trying to get people home from a community lot (mall, park, etc.), and unfortunately when that happens it's like the trip never took place; when I next play the home lot the Sims simply show up in a cab, like they went out for a two-minute drive. It seems to be happening more frequently, too, and it's guaranteed to happen if anyone tries to buy clothing. I don't know who to ask for help about this; a lot of the Sims sites don't seem to be terribly hospitable to non-technical people (MATY being the worst), and the only advice you ever get from EA Games is to get rid of your custom content, uninstall and reinstall the game, and of course the usual line about how the company is not legally responsible for anything.
I hate this, I truly do. It hurts.
