You can of course just goto network on file explorer in windoze do add network place and type ftp://10.0.0.x
(whatever your xbox's ip addr is) and then you just have your xbox listed as a place to go to whenever you need. No need to install an ftp client.
My problem is that when I ftp to the box my D drive (should be dvd rom) instead duplicates showing the contents of the c drive ? (happens with ftp client as well)
btw I recommend aceftp as favoured windoze ftp client