Nope, you're pretty much screwed. I got a Creative Nomad3 a while ago and I ended up buying Notmad by Red Chair software to bypass the crappy Creative stuff. It doesn't show up as a harddrive no matter what you do.
The reason WMP10 is required is because it acts like iTunes to the iPod. Instead of being able to drag/drop through the OS, you have to do it through WMP.