Very nice stuff Avanz!  Multiple dynamic groups can be a wonder. 

Robynsveil, don't forget you could also put some invisible fabric above the seams of your corset, and constrain the top of that part, leaving some fabric in between those constraints and the top of the corset, so that it stays up, but giving it a chance to naturally stretch and drape to the bosom. It may take some experimenting, but you can get really nice results from it.

I believe I heard somewhere that the cloth settings are saved in props from either Poser 6 or 7 and up, but I don't know for sure.