how to zap a valet 551 remote?

How do you zap the remotes on Valet 551 you can start over and fix a screwup?

I have two vehicles one with a Valet 551 installed and a second with newly installed Python 1400Xp, I got carried away programing my remotes that came with the 1400 and I set the remote start for the 551 to start on the first button press on my new 1400's remote while I programmed the 1400 by a bitwriter to start on the third keypress for the other vehicle.  When I go to start the vehicle that has the 1400 installed, the first of the three keypresses starts the other vehicle that has the 551 installed.

What I need to do is zap the 551 and start over on the remote programming with the end result to have to carry only one remote for both vehicles, in my 551 install/user guide it only has instructions for programming the remotes, in the one for the 1400 zap can be preformed by either the bitwriter or by the 12th press of the button; the 551 mentions nothing about the the programming zap mode.

Thanks!