haha yah that is the same reason my horns are not connected to the remote start unit. I feel it's best when nobody knows when you are locking/unlocking your car.
One thing I've been trying to find out about is an aftermarket climate control unit that auto cools/heats based on temperature sensing. Because with our cars, we need to preset the climate controls before we leave for next time. Because now and then I find that the AC should have been off and the heater should have been on. Where I live weather can change at random when transitioning between summer/winter.
So far I don't know of anything I can use for that. Even if its just to control the temp dial, the fan and vent directions can be left alone.
One thing I never did which I think would be a good idea is to add a few relays to activate the brake kill switch if a dash light comes on for either low coolant, low oil pressure, or low oil level. It is probably not necessary, but I feel it would be a good safety feature to protect the engine if anything was to ever go wrong.
I do not know what features the Viper 5706V has, but I assume it is better than the 4806V that I've had, mine was installed several years ago.
I suggest when installing the remote start, that you do not cut the wires and splice them, instead find a good spot in the midle of your wires and strip off about 1 inch of insulation in the middle of the wire with a sharp knife, this way you do not break a solid connection. Then wrap the new wire around it and solder, then wrap with high quality electric tap.
I feel that is the best way to add the remote start without breaking existing connections, and this way it is all solid because it is all soldered.
On mine I did this, everything is soldered. I also used a mini butane torch to solder (you have to be careful with the flame, it can be easy to burn things), because most soldering irons seem to fail for me. lol. I suggest using a soldering iron instead of an open flame torch like I use because it risks starting a fire if its accidentally pointed at something else under the dash.
I also used an old computer CD tray metal cover as a solder drip pan to keep the solder from ruining my carpet/floor mats.
This is one way to open the middle of the wire:https://www.youtube.com/watch?v=gWX3yLGPMCM