I DO NOT have the Zen, but an older Nomad Jukebox 3. Creative has an online update (in case you weren't aware). It successfully updated my XP system with the proper drivers. However, be very careful and read what you are choosing to download and install as I did not want Creative's all-in-one media player and it seems to be something they always try to push your way.
Your player must be connected to your PC before you begin the process.
http://us.creative.com/support/downloads/
Follow the links to "Creative Software AutoUpdate". Hope it helps.