If you get a map done (or sent to you), you can pull the map out of the PC V and view/edit it on your computer. Then with a USB cable, send it to the PC V and run with that map. The numbers on the map table represent a percentage from original when you look at the table.
Keep in mind, the engine will still use the ECU programming for the fuel injection. The PC V is just an overlay to bump the fuel up or down as needed based on the tune. If you add the auto-tune, it will adjust automatically and you can then accept the changes and that will be edited for you onto the map.