remote start key

Hello everyone, i wanted to install a remote starter on my 2005 xterra, and i have been told from a nissan mechanic that it is not recommended. He said that the newer cars have issues with them, and they end up frying ignition modules and main computer...? Is this true? anyone having problems...

Update: A copy worked; no chip. See post #7 below. I have a 2002 XE automatic 4x4 with keyless entry. I'm going to put a Viper 5901 remote starter/alarm in it. I'm doing it for the starter, but the alarm's a plus. Am I going to need a spare key to put in the car (a transmitter box)? I...