Yes, the resitor box is only to, putting it simple, give power to them, but you already have one in your car, so yo do not have to do anything, just plug them in.

That mad tyte JDM "spoon" ebay chip, aint worth shit, it is probably just a map with advanced timing. The good thing is that the ECU is already socketed. All you need to do is get someone like mtber to burn you a basemap for turbo applications, or look into uberdata or chrome, you can burn your own chips and tune the car, like a standalone ECU, but free. Take out your chip and put the new one in.

I believe CFT offer those services also, then they can tune your car. Your chip will not control the injectors. you are almost doubleing their capacity, and your ECU doesn't know that so you will just drown your engine with gas.

an AFC will work to run them, this is usually easier to figure out than chipping your own ECU.