Have you tried Karson's Rocket ship map he posted on the 2nd page of the "ECU Maps"? I know it says that he has the ECU unleashed Flash, PCV/AT combo. What I have heard is that the ECU Unleashed flash (like the Flash Tune flashes) don't really change the fueling much, just the ignition timing and the Throttle-by-wire throttle rates. I bet you could use his tune and it would work better than the stock gen 2 PCV tune. Might be worth a try until someone posts a stock ECU/header/slip-on tune.
You could also load up Karson's and compare it to the PC gen 2 stock tune and then gen 1 arrow header tune vs the gen 1 stock tune. You could always make changes to the gen 2 tune after you see where the gen 1 added or removed fuel for the headers and exhaust. I've done that before when I had an FJR and made my own maps. As long as you don't go too lean, it's hard to mess it up bad. If you are too lean you will be surging in the rpm/TPS range that would need to be richened up.
Good luck. I had a lot of fun making my own maps.... but also spent a lot of time playing with them. My bike was very much to my liking after all the work I did.