Rhonda,
You need the Diablo tuner to load the tune. Once you have that, you can use custom tunes. I have one from RDP motorsports that got me 11 more HP then the Diablo tune and a firm shift to die for! It drove me nuts when I could only rev the car to 4200 rpm in park.... how do I get to hear my Zoomers? Redline is also tuned up to 6500rpm and at wide open throttle you can extend shifts. When I drive it mild it retains all light to light manners you want in the everyday driver.