Question about Edge Programmer

[lbjailer]

I am about to install a K&N CAI on my 08 F150, 5.4L. I have the Edge Power Programmer, was using it on level 1. Now that I am installing the CAI and Level 1 is Transmission only, won't level 1 still work with the CAI? I removed the programmer and email from Edge directed me here **just in case I have a no-run or limp mode with the programmer after the CAI install.**
Sounds like I will eventually require the service of PHP anyway if I want to tow or become more agressive with the truck. I'm thinking I should send it in anyway just to get it out of the way. Also, does the tire size effect how PHP programs the unit? I'm runing 305-55R-20 (Radial T/As).