Rockbox auto installer for iPod (Windows/Linux) as well as an MPEG player plugin...
The Windows version of the installer, see this site -
http://www.ipodwizard.net/showthread.php?t=15153
The Linux version of the installer is here -
http://mako.cc/projects/irony/
The MPEG plugin info is located here. (Looks like the 1st Gen Nano is pretty decent with the plugin) -
http://www.rockbox.org/twiki/bin/vie...uginMpegplayer
Sorry guys, it looks like there is no auto installer for the Mac, as the Mac formatted iPod file system is incompatible with rockbox.
Have fun!
***I take no responsibility for any mess ups or botched installs. I am only providing you the links, not a tutorial or promises.***
Side note, you should be able to recover your iPod firmware if it is messed up using the iPod updater (included on the iPod software disk that came with your iPod) and choosing restore. It worked when I (partially)bricked my Nano (1st gen).