Did your friends vpc come with the vehicle specific harness, sensors and sensor harness? if not where did she get the bits from? Ive heard you can actually get by without the 1g harness and just get the thing hardwired into the vehicles harness. I was thinking of just buying a head unit and trying to get the other bits seperately because complete packages seem to be very expenive : (

it is possible to hard wire it in.. as for the actual wiring diagram i'm not too sure

you will need to find the 1ggte chip tho.. i haven't got any tips for that one unfortunately

my mates one came with the pressure sensor & harness's but not the air intake temp switch.. that you can buy from www.hksusa.com

good luck :)