Using Rockbox on Sony NWZ-E344

[CGEffex]

I'm not sure if it is appropriate to post before trying anything, but I was wondering two things.

1. has anyone used rockbox on a Sony nwz-E344 before, if so, does it work?
2. Before I do ANYTHING, is there a way to backup all the data I currently have on my Mp3 player? I know I can copy the songs to my hardrive, but how can I backup the existing firmware and driver data stored on the device?

[saratoga]

You can find a list of targets that rockbox runs on here:  www.rockbox.org.