i don't have the info you are needing but i have worked on car installing remote starts and alarms along with keyless. the crossfire is a tricky car with needing to split the door lock triggers and diode isolating both.

in remote start he will need to know the bypass info and you have to give up a key.

if your installer does not know where to get the info for wiring or directechs he is not qualified to install the setup. needing to know how to splice into the starter or bypass the factory system using a transponder bypass. please find a shop that has a lifetime warranty.

i got a viper 5901 installed in my manual transmission but i am still working out all the minor bugs to fix it is not a everyday car to work on definitely need plenty of time