1. If the dealer installed alarm is aftermarket, you'll either need to figure out how to interface with it, or rip it out. Most likely the latter.2. No matter WHAT the RS units state, you'll probably get no more than a few hundred feet out of the remotes. Mostly due to factors like the car's construction, the position of the sun, and physics itself.3. See #14. The 'no frills' part is pretty easy.5. The 'pay extra for us to stand behind our products' is a contract with the manufacturers that say the products have to be professionally installed (for the non DIY units) in order for the warranty to be valid. If you install any of their higher-end equipment yourself, boom, the warranty is instantly invalid and the manufacturer will not help you.Beyond that, the warranty for alarms through BB and CC do work. If your unit dies (sometimes even the remote) often they'll just swap it out with the same unit, or a minimal fee to go to a newer unit. Just because many other products have crap warranties doesn't mean alarms don't. I should know, I used to install them for CC and I did a damn good job with it.That being said, something like the DEI Valet 561R will be fairly easy to install.
http://www.circuitcity.com/ssm...il.doNow, let me tell you firstly. A remote start is very invasive. You need to wire in to your ignition harness, as well as tap a wire into your fuel injection wires. You'll also need to run a wire under your hood for a 'hood pin' safety, which will disengage the remote start if the hood is open.RS is not for the faint of heart. Know what you're doing and have good documentation for the wiring. Installing this yourself will mean if you break something, you'll have nothing to fall back on. Simple things like the fact that the parking lights in the vibe are a negative switch system instead of a positive are easy to miss, even for people who have done installs before.Also, as said, knowing exactly what kind of alarm is in your Vibe (if it is not stock, meaning, you're not using the pontiac keyfobs) is needed. You will have to interface with it in order to use the RS functions, or else you'll need to get a full remote-start / alarm system.Keep in mind, i'm not trying to dissuade you from getting a remote start. I installed mine several years ago and will swear by it (I have a Viper 790XV), but I do want you to realize that it's not the same as installing a head unit or a subwoofer.
2003 Vibe GT Lava"He inched his way up the corridor as if he would rather be yarding his way down it.""For a moment, nothing happened. Then, after a second or so, nothing continued to happen." - Douglas Adams...we all miss you