I'd like to know about this as well... this would be a nice feature to add (I have central locking on my Carat already).  I've checked the archives since January 2002 and there was only 1 mention of doing this, not successfully I might add....
Anyone out there have this "feature" installed?
     -Robert
-----Original Message-----
From: Paul Guzyk <paullist@GUZYK.COM>
[snip]
For an '87 Vanagaon (non-westy)
Van has central locking.
Anyone have suggestions for wireless keychain remote add-on (with or without alarm system)?