You cannot set the timing on the Focus for one(it is controlled from the ECU). I suggest that you go get your money back for that much. It is aganst the law in most states to claim that he did work that IMO is not possible.
If I was you I'd clean or replace your IACV(idle air control valve)as well. You can get it at 10% over cost from Village Ford here, http://www.focusfanatics.com/forum/
133whp-126ftlbsTQ Eclipse CD8443,Eclipse PA5422, JBL GTO751EZ, PPI 356cs(Rebranded A/D/S 346cs), JBL p1024, SubThump enclosure, RAAmat BXT, Damplifier Pro
Hatch Nation #140
Caeci caecos ducentes