this might not be the right forum for this but i need to know.

i have a pc that is running on windows 2000 and a laptop that is running on windows vista. i have limewire on my windows 2000. i have itunes on both computers. i saw on itunes where it says user limewire tunes. if i download a song on my windows 2000 computer then i can somehow see it in itunes on my laptop. im not sure how this is happening. since i have the new ipod nano that plays videos i have to use my laptop because the nano wont work with windows 2000. i was wondering how i can get those songs from the user limewire tunes list to my ipod? i dont want to use the removable drive to transfer songs from my pc to my laptop because that will take to much time. so, my question is how can i get those songs from the user limewire tunes list to my ipod?