I'm totally having a brain freeze right now trying to describe thise but I want to make a purse cake and have no idea how to roll the fondant so it is uniform in size for the piping on the edge of the purse - is there a trick to it??

Similar to the brown piping on this beautiful cake by gingersoave!
http://www.cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1335476

Well......I think I'd roll it out and cut strips with that roller tool from Wilton. If you roll it thin enough, you may be able to fold the strips like you would if it was actual leather strips on a real purse. Not sure if I'm explaining myself well enough. Or, you could roll the strips after you cut them into thin snake-like pieces and apply to the cake.

A clay gun would do it. I picked up a really inexpensive one (used the coupon, too) at Hobby Lobby for around $10. It came with several discs, including several with larger holes so make thicker ropes.