all depends what you put on the add if you put just dt re then he has no grounds if you put dt re dt x all years then well you need to refund mate sorry =[
I just pulled up a parts list for both 2005 DTX and 2005 DTRE, it's not showing the loom as such, but every componant that connects to the looms in both are identical, only made the one model DTX the 2C81 in 2005
Well if you want I can put the pics of both on here for you to send him, but personally I'd tell him to sling his hook, if you know it to be a good working loom.
yeah had Sgt-syphilis help me out the other day with wiring in all the immobilizer and remote start etc and everything was the same and ive got the RE and he has the DTX, must be :)