Personally, I don't know a whole lot about my ipod (a 3rd gen nano) as my husband puts all my music/videos on it for me. I don't recall there being any special 'software' for ipods so to speak, especially not for the older versions. The closest thing you'd have would be adding info in the 'notes' section on your ipod.
On a side note however, I would be cautious about bringing your ipod to clinical. Despite the fact that you plan on putting useful material on it, your clinical instructors may not be as agreeable. It's primary use is still as a mp3 player and they might not be ok with you having it during clinical. Just a thought.
Above all, good luck in your studies!