magnacharger sc installation problems

[flh2fan]

i installed a magnacharger sc kit on my 2003 h2 and it seems i opened pandorras box. i can not get the thing to run anymore. i have been troubleshooting it for a while but i am starting to loose my wits.
here is the problem: the engine will not run on all cylinders anymore. no 3 & 4 on the passengers side bank will not run and the engine light blinks all the time. i tried already the following with no success:
1. checked for spark / moved plugs around; the miss stays
2. checked the coils / moved coils around; the miss stays
3. checked the fuel injectors/ moved injectors around; the miss stays
4. had the dealership re-flash the computer
5. got a new computer
6. verified mechanical installation of kit.
7. wired open boost valve put, stock injectors back in, stoc pcm
All those measures were done with the help and advice of ASE, GM certified mechanics, magnacharger, and the hummer dealership / service department.
i am pretty desperate right now. does anybody have any ideas? any kind of help is deeply appreciated. THANKS!