Tire shops usually have a "Nut" remover. Typically charge a few more pennies for their trouble, but occasionally worth the $$ to avoid the @#$%^&^%$$%^*& of busting your knuckles. I had a similar problem few years ago, and they were able to get them off without much difficulty, and cost me like 4 or 5$
Erik
Thats what I would try, 5 bucks would be well worth your time, you could just call around too and find out who will help you out, some shops may just let you borrow the tool in front of their shop...