If I am reading this correctly somebody told you that you couldn't connect to a drive that was a network drive on your WinMCE computer? If that is so, while it is correct, there is a workaround. I have a samba server setup as my file server and on my windows mce machine all my media is on network drives (drives on the file server, not local)
Its early so give me a few hours to try and remember how I did it, but it involves setting up a logon script for the xbox user. I just have to remember what was in the script now. (I don't use it anymore as I had to dual boot win XP and winMCE. It was just easier for me to use my xbox for media)
I think this may have been it.
http://blog.vanosdale.com/PermaLink,guid,5...8292c9f722.aspx