Backed an ipod up with dd, how to retrieve all tracks in one go with gnupod?

I have had gnupod for a while. Still haven't figured out how to use it though. I usually just go for gtkpod. So this question, in case anyone had any doubts after reading everything below, *is purely about gnupod syntax*. Recently I decided to get my ipod replaced under this replacement scheme. (I don't like proprietary hardware, etc., but if someone is going to give me a brand new piece of hardware... for something that was originally a gift... hmm...) Anyway, long story short, I backed up my old ipod using dd: dd if=/dev/sdb2 of=ipodbk and just tried running gtkpod (with ipodbk mounted as -t vfat -o loop) to see if it would pick it up, like it does when an ipod is attached, which it does. But this question is not about that. I don't want to waste time with gtkpod's bugginess when it comes to exporting an entire ipod's files (tried it before. ended up with a lot of 0 byte files... no thanks). I just want to be able to export all the tracks from the disk image in one go. The command probably looks something like gnupod_something (some switches) -m /home/user/ipodbkmount/ (some stuff?) and the output probably looks something like (window flooded with 1000 lines of text) but I've never really been able to get gnupod to work. I'm sure it's a great program, and I have to usually invoke it as gnupod_check -m ipod --fixit once in a while when gtkpod loses track of what it's doing and makes errors when it writes files to the device. As for gnupod, I'm just not intelligent enough to figure out its syntax on the more routine ipod manipulations, I think. So, yeah, what's that command?