Dirty hands for Ford Lasers specificially I recommend..
www.fordlaser.com ;)
Can't help you with your problem, sounds really odd though. The only
ECU limit we have are fuel limits and at 5kRPM on standard boost you're definately not hitting it..
So yeah go to
www.fordlaser.com and ask there.
(PS - You have a B6T engine if it's the 1.6L 16v DOHC Turbo)