2007 altima 2.5s with viper 5900

I can't seem to find anywhere online that can give me an answer to this. I wanted to know if it is possible to add the Viper 5900 alarm to a 2007 Altima 2.5S? I called Viper and they said their alarms can be installed in any car. I've went to Nissan dealerships and they said yes, no and not sure. I've checked at Best Buy and other places and got yes and no as an answer. The biggest problem I've found is the intellikey. For some reason installers say this can't work because of how the system is set up. So would it be possible to add the Viper 5900 to an Altima 2.5S using the remote start, proximity sensors, remote window, and the other things that come with the alarm? Someone said everything but the remote start would work for sure, is this true, is there a bypass module for the remote start? If everything will work but remote start, that's fine. But can someone just give me a straight answer of what will work and what can not? Thank you very much.