Almost perfect but, well, almost. Need some help

Ok, I got this new dress for my characters. It's great stuff, has a ton of morphs/textures and can fit them even when they have almost all their body morphs. I have a pic attached of one of my chars in the dress so you can see.

The problem arises when I try to pose her. Specifically, the legs. If the legs move, they go right through the dress. I have the dress parented to the character, and I have tried using the handles (The handles are useless, they do nothing, and have to be made invisible for renders, major pain in the rear) and am at a loss. This dress was an awesome buy, and even if I can't do much with the legs, I still plan on using it, but it would just make it perfect if I could have the dress move with the legs.

Any ideas? Program is Cararra Pro 6.2