I got this "recipe" from a Pet Emergency class I just took...never tried it, though:
1qt hydrogen peroxide
1 teaspoon of liquid hand soap
1/4 cup baking soda
Good luck!!!
I also found the same "recipe" on this site:
http://ksks.essortment.com/skunkodorremed_rwlg.htm
and this one:
http://dogs.about.com/cs/generalcare/p/skunk.htm