So, I tried something new with this one. I think I've made the correct settings to get the dress to auto-fit to the model. It works on my machine, but I'd love to know if it'd work on yours!
I've set the dress up with 3 texture domains, the straps, the chest/back fabric, and the skirt. Also, as always, this is a free item, so support is limited. If it doesn't load, let me know! And please tag me if you use it!