If you have a damaged car in evolution mode go into your garage and go to your first car. Keep pressing right until you come to your damaged car.
Before the picture of your car comes up press x,to get out of the car selection mode and then go down to the repair option and press x to get into it.
(you HAVE to do ALL of this before the picture of your car comes up) If you do it quick enough(and I mean quick)your damage should only cost a fraction of it's normal costs.
It's a worthwile cheat so keep trying.
Added by: Leon Cutts , ID#5956