You can also push the brake peddle to bleed off any stored charge when the battery is disconnected as well. Re: 'Drive it like you stole it'. Yes this can be a problem for people who may track their car on the weekend. If you drive it soft through the week, it can take some time for the ECU to adapt to the different driving style when you hit the track.
Many will also suggest you get a tune for it as well. The air flows differently of the maf, with a CAI than over the stock box. Therefor the maf may send readings incorrectly, or they may be misinterpreted by the ecu :-\