Cabriolet Remote Question

[AW]

My friend recently purchased a 1995 90 Cabriolet.  On the keyring she
received from the Dealer (not an Audi dealership) there is a small two
button remote for locking/unlocking the car.  In short, the remote does
not work.  I changed out the battery and still no luck.  There is a
supplement in the owner's manual about this remote in which it alludes
to the fact that if you change the battery in the remote, "the system
has to be reset by your authorized Audi dealer."  

Has anyone run into this problem with this style remote?  I did change
the battery, but that was after it didn't work in the first place.  Does
anybody know the process the dealer uses to reset the remote?  Am I able
to do it myself?

Thanks for any assistance.

Sincerely,
Andrew Wong
'92 S4
'90 80Q
'85.5 944