I'm looking at getting a Kennedy ECM tune

Is this a swap I can do myself? or do I need to take the truck into the shop for it?

Also I'm a little confused, do I have to buy the extra ECM and then return it for a refund, or do I just send them my old ECM when you get a tune?

Q's for Jack
With the dual mode, can I get the two tunes I want or is it just what you send?
I.E. I'd like a economy tune, and a low level sport tune that will stay under the OEM trany HP limit with my other mods (Intake and soon a new exhaust)

Is this possible, or do we just get your 50HP tow and 100HP perf tow tunes?