I have a macbook at home as my home computer and manage my itunes from that computer. Now I find myself on the road with my windows work computer and want to access my itunes library. More specifically I want to go to the itunes store and download an audio book and sync it to my ipod so I can listen to it while driving. Can I download itunes on this computer then download and sync? or will that erase what's on my Ipod? Also i have mobileme. Any help would be appreciated.