It cost me 200 for a skunk2 program, own vtec crossover with own rev limiter and the P28. Might have been 250 for it, i can't remember it was a while ago. But i got mine through Locash racing. What I would do is get a P28 with a base line map of your actual motor, then get another P28 with what ever other supposed "aftermarket" program you want and dyno the two and see which one is better. The lower HP one sell it online, at least you will find out if you actually gained some power from chipping and at the same time you can post a review for it to help out other peeps.
Milan