What is the easiest way I can make a slipper out of fondant and have it ready by Saturday morning?

CC fondant shoe tutorial:

http://www.cakecentral.com/article69-How-to-Make-A-Gumpaste-Shoe.html

Mixing fondant and gumpaste will make a mixture that dries more quickly than fondant alone.

Duplicate post, please see also:

http://forum.cakecentral.com/cake-decorating-ftopict-561399-.html

HTH