What would be a tune close to the CAI I have?

I recently bought a Diablo sport predator for my 2006 gt mustang. To my knowledge you just plug and play and set the tune you want. But in my case I really don't know what to set it on. So it wound throw a code. I have a 2006 gt mustang. all stock internals. It does have a Spectre CAI 4inch round ...