Ok, I spent most of my spare time last 2 weeks to make a tool that you can use to create .dsnd files that you can download to the 2box module.
You can download it from
http://www.shortestpath.se/dsoundtoolIt is based on Java and should run on all operating systems, although I only tested it on Windows (and an early version on Linux Ubuntu 9.10).
The software is not freeware; for the time being you pay by donating $30 to Médecins Sans Frontières (MSF) or WWF; I hope you understand that I put considerable effort into this, and would like to see something in return, even if that means the idea that I perhaps helped to improve the world a little bit.
The software is really bare-bone and many features can be added. But further development completely depends on incoming mails with notifications of donations to these organizations.
Give it a try and let me know what you think!
Best regards,
Louis