[Kurlon]

If you're using someone else's map, you just upload the file via Dynojet's software to the PC3 and you're done. To custom map by hand, you have to tweak individual cells, it's alot like working on a large spreadsheet.

On the left you have throttle positions, 0 through 100%, with finer steps at smaller throttle openings. Across the bottom you have rev points in 250 rev steps. Line up the throttle position and rev, that cell is where you add or remove fuel in comparison to the on board 'stock map' in the PC3.