I've only done draping once on my daughters cake and I use Wilton. What I now know that would have helped is to wait and not put it on so soon after rolling. I would also try mixing a little bit of gumpaste or tylose in the fondant. This should help.
You should PM Sweetwise because I think Kathy is really good at drapes.
I made some for this cake and used half fondant, half gumpaste:
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1820901
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1815018&sub=1815039
like this in the link?
If its humid I would use extra dusting with cs or corn starch, and just fold it like it was material.....podwer your fingers well, and then I use a clean thick paint brush to brush excess from drapes lightly, hth
You tube has some videos on how to do them. This one is done by Norm from Sweet Life Bakery
http://www.youtube.com/watch?v=TDQPpoYruH8&feature=related
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