theres 3 differnt ways to do it
1. you buy a V2 and download the software, have the guy you bought EFI Live from either build your tunes or call up a tuner and pay them to build you some tunes, then once they are sent to you via email, you flash them in. The plus is you can always try tuning the truck yourself if you ever feel froggy about it.
2. you buy an Autocal from an EFI Live tuner, this can either already come with tunes ready to be flashed in or the tuner will ask you to do some logging on it first, send that back to him and he will talyor make some tunes to your truck. Downside is you can not tune the truck yourself if you ever wanted to try it.
3. is you buy a pre-tuned ECM from a tuner that bench flashes tunes in for you and you jsut swap ECMs so your ready to go. Down side is you can not log the truck if an issue occures, tunes are not made specific to your truck without you having to pull the ECM everytime and sending it back and forth with the tuner, and that tune is locked to the ecm (not sure if you can flash over it should something happen).