You won't gte your tracking sorted out mate. Mines been lowered 50mm for the last 3 years, had 3 different engine's (1.4 with NOS, 1.6 with NOS, and now the Focus RS engine) and throughout that time, my tyre wear has been perfect...this is why...
You have to contact either
www.prosuspension.com in the states, or ESP Design in this country and fork out £80 to buy camber corrector kit.
Check the site out, as this small and simple piece of kit is amazing!