Have you checked to see if your clothes are set to a "fit to" mode? This will cause havak if you try to move them or rescale them. Try turning the fit to off and then rescale. Also if you try to use poser 5 or 6 conforming clothes in Daz, they won't work. Try some poser 4 clothes and see what happens. Also there is a freebie called "scaleit " rescaler plugin available that will drop right into your Daz scripts folder that may help (I got it but I can't remember where,deep in the old renderosity archeives). Try to do a search under utilities in the renderosity freebies section.