PHP can do a rollback flash or you can get a performance flash from them aswell. The FICM programming and PCM programming are seperate all together so it will not interfere with your tuner at all. There are a few places that offer performance FICM flashes PHP and innovative being a couple. PHP doesn;t offer remote tuning anymore unless you have the gryphon tuner which why would you they used to send you one remote tune and you send it back but with border issues (delays) they don't do this anymore. YOu can also upgrade your voltage to 58v which makes your injectors "open" faster and hold longer giving you more power in return, I have heard in some cases 40hp on a stock truck.
2006 PSD CC FX4 Sport SRW S/B
SCT with custom tunes by Quick tricks, Grand Rock turbo back dual 6" Miter cut stacks,
Xenon Fender flares,Tinted factory tails, Recon white lightning L.E.D. light bar, Glasstite topper