I currently have a Clifford G4 Concept 100 on my car. This weekend i came up oo a Concept 600 without any key chains. From what I know, the differences between the two is that the COncept 600 has a little more features: such as remote start, roll-down windows, and maybe a couple more things. My question is what do I need to swap out my alrm with the COncept 600?