I was told you couldn't retain the factory remote start because the viper sytem cant talk to it and bypass the factory immobilizer. I would love to keep the factory fob but that defeats the purpose of the alarm I got with the lcd remote that can let me know if my alarm goes off from like a mile away.Jgos929, Sorry you're having issues with the install. You can install an alarm only on your system and retain the factory remote start system. There are even modules that allow you to keep your factory key fob. I would call and speak to them, let them know that it's not working to your liking, and see if they're willing to work with you on installing an alarm only and retaining your factory key fob and auto-start.
The salesman you spoke with probably wasn't aware that this is a possibility. But that's not your fault, they should have educated you properly.