yes. islamabad does not return the file. they do not give any xerox copy. intelligent owners make a copy before submitting it to the excise authorities.
I can get the file checked for you if you wish. The cost is rs1000.
you can get it transferred even if it is on open letter. You need a transfer letter signed by the actual owner (not a stamp paper).
if the car has passport book, same info like DC 1 is written on it as well.
The expense for transferring a car on open letter to your name will be around 10k.
hope it helps.