Try this:
create an e-smith user called user with password of user.
Logoff from windows then at the Windows "Network Logon" prompt login as user with the password as user (If you don't get a network prompt change the "primary network logon" from windows logon to Client for Microsoft Networks)
Now pull up a dos prompt and type "net use h: /home" without the quotes
then "copy c:\path_to_rpm\rpm_name h:\rpm_name" without the quotes
You can also type into the address bar of the browser
ftp://user@ftp and then use windows drag and drop.