Car Dealer/Car Loan Upside Down Help

[jplp5886]

First off bad credit then and still now (worse). Purchased (FEB 2007) a 2005 Dodge 1500 truck with 36k miles on it. Put $1500.00 down 11% interest. Purchased from small dealership that is now out of business. When then dealer was looking for financing for me they made more than 15 or so inquires to find it with out telling me about it. Well not that has damaged my credit even more and can not get them taken off. The payment on is $605.00 a month and this economic time it is killing me. The loan is though Regional Acceptance, I have called a few times to see if they will work with me on lowering the payment and they will not do anything to help. I can not get a loan anywhere and I do not want to file bankruptcy. Does anyone have any ideas on what I might be able to do? I can not just let it go need to get to work. Also do not want to loose the roof over my head.
THANK YOU!!!!
HELP...HELP...