I'm not trying to highjack your thread, but I've been looking for an answer as I've got a forced induction engine that I would like to use the higher hp Sniper setup.
To answer your question, I have read up on both the FiTech, and Sniper on other forums [I would recommend a site, but its not a website that I particularly like, so a net search under "Holley Sniper+ forums should help you find it, and other sites].
From what I've read, there isn't much to do on the Sniper, but install it, and it pretty much programs itself.
Its the self programing that I like as I had the Digital/programmable MSD 6AL2 setup, and even though I understood how to program it, I just couldn't get it to work.
I had the timing locked out as per the MSD instructions, but I never could get the starter retard to work correctly. With that said, I never really knew if the rest of the timing retard [for twin turbo engine] was working, or not].
So, with that said, I wouldn't mind doing some fine tuning if I had to with the Sniper, but I don't want to have to take a class on how to do it like you would with a setup like Megasquirt.