It's also worth noting there are ssh/scp clients for the 770 (dropbear which requires the xterm but not root for the client, and openssh which I don't use and know fairly little about).

Like NFS, secure shell is more at home on *nix than windows. I haven't used them, but cygwin allegedly allows one to run ssh service from a windows box and sshwindows allegedly packages it in a fairly friendly way.

Not that nfs isn't a good way to do what you want, but ssh is another option.