I saw a post elsewhere, I'd really have to dig as it's been a month since I read. Was on like chicagosvt or chicagolandmustang. Just drawing a blank on which site it could have been.
Anyway, a guy did a single turbo install, not positive what manufacturer, but had the same codes throw. When I first read the thread it was already like 3 or 4 months old, and all their attempted remedies resulted in all or some of the same codes. I know he was extremely frustrated about backwash, but in their attempt to fix the backwash, they still threw evap codes, at which point the car went to limp mode and then a no start condition almost immediately after. Sounds like you got similar issues.
I'll do some digging, see if I can find it, so at the least you can have a sort of do's and doent's list. Maybe he came to a resolution and you and the tuner can save yourself some time..
Also, I see your postin on modular, try there as well. Numerous turbo guys over there..