You WILL have to relocate your blinkers.
You WILL need to remove the PAIR valve, and install block off plates.
(Around 50 bucks from Veltune.com) If you do not, engine damage could occur...
You DO NOT have to buy a powercommander to run this exhaust with, I ran mine with and without a PC. However, to use the full potential of the exhaust, it is recommended to get the air/fuel ratio properly mapped at a tuner using the PC.
You CAN run this exhaust with or without passenger footpegs.
And no, the exhaust doesn't interfere with the passenger in any way. ( My wife loved it) It doesn't get too hot, or get in the way.
To mount it, it is easy, just takes some time.
You have to
Remove both side fairings/bottom fairing/both seats/tail fairing.
Take off old exhaust and PAIR valve.
Take off the passenger pegs, and install the new spacers and exhaust.
I got some pics somewhere, but not detailed...