Ipod linux

I was going to put this in the firmware section, but that is more for burners. Anyway, I have been looking around the net and have found ipod linux. As i am the sort of person who will download anything if it increases its capabilities, i would like to know this;

if i change the firmware on my ipod, will i be able to put it back if something goes wrong? Is it like a burner, and if it goes wrong it can stop from being recognized all together? Or is it like a Mass storage device where if it all goes wrong i can easily put everything back. (I like the idea of playing videos on my nano, even though ill probably never keep them there)

I think it’s like a mass storage device. I just have the iPod shuffle and it acts like that (using Windows XP). You can test it by not installing iTunes and plug it into your computer.