I am ready tp purchase flash scan and download 7.0. Presently I have EFILive 6.0 pro version.

What I am unsure about is the following. I have three PCM for our
2000SS:

Oiginal PCM, modified only to lower fan temperatures a bit and allow revs to go to 6400 rpm. Given my mods I meet emissions in NY with flying colors with this one.

Tuner PCM which inlcudes programming for my heads/cam, LS6 intake,
ported TB, shorty headers and other std. bolt ons.

An stock programmed pcm which has version updates for the 2000 model year, no other chnages. This is my back-up.

Can I modifiy with the single personal license all three PCMs. They all
are configured to work in my car? Or do I need to pick one for tuning with flash scan?

Gert