In case anyone is interested.....
Software and hardware is now available that allows you to flash tune your own car. It works just fine, and lists most of the MAP tables for the car. It also includes a dynamite data logger that allows you overlay a log file over a MAP table you are working on.
The software cost is $250US for a Personal license which locks the application and cable to your laptop and ECU. Click here for details.
The cable is a Tactrix OpenPort 2.0, and can be purchased directly from Tactrix for $169US plus postage. Click here for details.
The software will read and write happily. It corrects the checksums on file save. It can also recover should a write fail. All in all it is a very cheap option for tuning your car. Given enough people, you can build a database of files and results.
You have control over nearly all parameters.
Enjoy.........