No need for the bike to be running, but just connect the PCV to the computer via USB. I haven't done this with the basic PCV in quite some time, but IIRC when you load the second (economy) map it should ask you whether you want it saved as Map 1 or Map 2. You can load either map corresponding to either switch position.
The PCIII needed to be powered by either the bike or a 9V battery, but the PCV can be powered by USB only.
The PCIII needed to be powered by either the bike or a 9V battery, but the PCV can be powered by USB only.