ive been raped by dickson a few times now.... wait.
remove everything thats not standard or obvious - boost control, turbo timer etc. if you have a pod, make sure it mounted to the car.
put the stockies on and remove adjustable suspension.
most important of all, leave a few small things wrong thats easy to fix, eg broken tail light globe, empty washer bottle, as they'll want fail you on something first time around. oh, and be courteous to them - goes a long way.
*EDIT* seriously, if you can, ask your gf/friend/fembot to take it over (skimpy clothing helps) and be a bit blond about it. they'd probaby pass a gokart if its brought over by sexy chick. thats how we pass my missus S14 over with heaps of mods