I have bought 2 adjustable boost operated switches which I want to use for an intercooler spray and a fith injector.

I have sorted the intercooler spray one out but was wondering if anyone has wired their cold start valve to act as a fith injector on boost. I am looking at the injector starting to work at around 15-17psi with the use of the boost operated switch I have an idea of how to wire it up but was wondering if I can still use the cold start valve for its normal use. Obviously I will be getting it setup once everything is installed and working.

Cheers
Dave