Road Tuning(fuel) turbo Subaru w/ ECU Flash and Romraider

Is there a way to accomplish this cell-by-cell process using Romraider and ECU flash on a Subaru. I'm comfortable with the focus on what the goal is that's being accomplished, but I'm unsure on how to actually do this for my application.

I suggest you take the pratical standalone course, there is a worked example on the ECUFlash / Romraider combo. It is on a dyno but the specifics of the software are well explained!

But to put it in simple words, you'll need to start the car, drive and make logs, make adjustment to the tune, flash the ECU and repeat until you get the results you want (sound pretty simple eh!). Note that you can't do live tuning with ECU Flash.