WE had this discussion numerous times and I still think that nobody can have any rights, moral or legal, to any "tune" since the original software IP rights belong to Bosch. So anybody modifying (tuner) it for profit or entertainment (end user) operates in that grey area of Bosch's "don't care" zone. End of story.
Chris sells a product, cable and software for flashing yourself, much like the subaru guys, yes he charges for his NON opensource software, NON opensource hardware(or cheap) and for checksumming/modifications that most have a hard time doing. The package is good enough to tune a car well, i have done it personally and like the package a lot. Your paying for the software development, hardware, checksum abilities that very few understand on this board.
Matt- There are plenty of files and definitions on this site that can get you started, tell us what ecu code you have, and then you can be informed of what you need or even some links. 06A906032LP/PL Damos on this site will take care of any wideband car go to think of it......
http://nefariousmotorsports.com/forum/index.php?topic=866.0