SWEET! i just figured out that you CAN rewin prize cars for non-series championships. if you go and try to redo the race, it will ask if you want to clear all the trophies... then you can rewin all the races and get another prize car. for example, you can clear the two trophies in the rally d' capri (on easy) and rewin both of them then get another toyota rsc rally car which sells for almost $280k... a great, quick way to make some cash.