Car Alarms: DEI Valet - remote start button combo to run every few hours, valet remote start, exact model number

Question
Hello, I had a Valet brand remote starter put into my car about 4 years ago.  On really really cold days like today, I like to have it go into the mode that it starts every 2 or 3 hours for 15 minutes at a time.  Unfortunately, I've lst my manual since last year, and don't remember the combination of buttons to press to get it in this mode.  I remember something like starting it, then hitting a button until the lights flash, then killing it.  I've tried some things, but can't get it going.

It's a mid-level DEI Valet remote starter/keyless entry system.  I don't know the model number.  About 4 years old, and it's a 2-button model.  Any help is appreciated.  I've been searching for quite some time, it's too bad DEI didn't have a website.

Thanks.

Answer
Without knowing the exact model number of the system I cannot pinpoint the manual for you.  However from your description I am thinking it is the 551T.  

Directed lists all of their available user's manuals on their website:

http://www.directed.com/Support/ProductGuides/Owners.aspx