damn, 5 weeks for idle screws? that took me like 30 minutes to put on! It sounds like there is some serious damage there, assuming your bottom end is seized since your flywheel is not moving, it could cost you anywhere from $800-1500 to overhaul the motor yourself which includes all new seals, bearings, pistons, crank, gaskets, etc depending on what else is broken too. What a shop would charge you i cant say, but it wont be pretty!