There are a lot of ways to do a dress-up doll. Some people just make buttons/icons that you click which will add/replace a piece of clothing. That's probably the easiest because then you just have to set visible=false for all the clothing that's not currently being worn and you don't have to deal with drag & drop + snap into place.
An other option is to have a category menu where you can view groups of clothing at a time. Still the solution is visiblitily.
So, don't use frames at all. Group the clothing items in arrays or something and set their visibility to true/false.
"Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime." -- Chinese Proverb.