Unlike other tunes that require additional add-on modules or a throttle pedal pressing song and dance, the Procede allows you to change maps by simply double-clicking on the dashboard's DTC button. Just as you would double-click on a computer mouse. This can even be done while driving the car! The factory DTC functionality remains fully intact.
For more information, see here: http://www.e90post.com/forums/showthread.php?t=295560&highlight=DTC+procede