Several, One option is to but a tuner. The other option, one that I did,is look up range technology. Plugs into the OBD port. There are several threads on both in the forums.
I am not sure. I thought it was cheap, but some one posted that you could have bought a tuner for that price. I bought it because I ahve no clue how to use tuners
The tuner is a plug and play option, pretty self explanatory and just follow the right options and prompts and it does it for you... besides you get a nice diagnostic reader and a fun tune too! ;o)