Cessna Mustang

Well, I downloaded the free trial FSX abacus mustang. I thought the search for this plane was over until the error message appeared. It's having trouble loading the MDL file. I've tried all of the troubleshooting methods, and none have worked. Any help? I have 7 days left in the trial so please hurry! If you know any freeware FSX Mustangs that don't suck, let me know also.