using all 4 buttons on dei viper remote

I'm installing an old Viper 550HF alarm with 4 button remote. I know that button 1 is channel 1, button 2 is channel 2, and buttons 1 and 2 pushed together is channel 3. However, I have no idea how to get buttons 3 and 4 to work. I have looked for positive and negative 12V outputs from the alarm's brain wires but can't find anything when I hit buttons 3 and 4. Do these buttons need programming or something? Can someone direct me to literature that will show me how? Thanks. Does anyone know if I could use buttons 3 and 4 to control power window controllers?

Wow thanks for the offer of help. What do you mean by auxillary channels? AFAIK button 1 is for lock/unlock, button 2 is for silent chirp or boot release, buttons 1 & 2 for remote start...but 3 and 4 are spare...so are these aux? I think I read somewhere that each button represents 4 channels? Also, off the top of my head, there's only about 12 wires that come from the unit..and all have designated functions...so will the programming of the remote affect the output of certain wires? Thanks again and I look forward to your reply.

The manual for the 550HF is in the download section of this site. It tells you how to program the remote. It has a trunk release output, and one more aux. output (channel 3). Search

I already have the manual. I thought that because the remote has buttons 3 and 4 I could use them...but I have come to realise that they are useless with this 550HF alarm. i.e. the fob would have useful functions on a different alarm system which has more chanels.