2006 E350 Remote Start

Looking at getting a remote start for my 06 E350. I've been looking at the units from Ford and like the idea of it still being covered by the Ford warranty.

The van does not have a PATS key, but was factory equipped with remote keyless entry. I've talked with the parts guys at a couple of dealerships and we are all confused by the systems that Ford offers.

Does anyone know if the remote start kits they sell with remote keyless entry or without will work with my existing OEM keyless entry? I guess what I am trying to say is I want one remote for everything. The dealerships are not sure if I will have that option with what remote package or if I will have to have 2 remotes, one for the remote start and one for the keyless entry.

Does anyone know?

The unit I was look at was the Gold series 2w7z-19g364-aa.

Thanks!
2octopS