So I need to find someone who has a CMR tuner? or how does that work?

I've got a 2006 Trailblazer SS and want to run an electric fan kit from PCM of NC, they offer a patch with hptuner and efi live but nothing for diablo sport. Can a custom tune be written and upload from the intune, and also once the custom tune is loaded will I still be able to make adjustment to ...