I have created a complete guide on how to upgrade MMI 2G and 3G to the latest version of the firmware - 5570. The key thing here is that in the tutorial I am showing you how to not brick your Bose AMP in the process. No special tools or VCDS required. If you use the links to download the updates the only thing that you will need is blank CDs. If you have any questions let me know.
https://www.youtube.com/watch?v=0cajxNC4TGo&t=0s