What about moving the data to the Linux server, then using rsync or
some other method to keep a copy of the data on your windows server
that is being backed up? You could install Cygwin on the windows
machine to install rsync and ssh on the Windows machine.

Alternativly, you could mount a cifs share and zip/tar/whatever the
files you want backed up to the Windows share. Use cifs for this,
smbfs seems to have issues creating files over 2gb. :) The syntax for
smbfs and cifs is exactly the same. (mount -t cifs -o <insert same
options as smbfs here>)

--
Andrew S. Zbikowski | http://andy.zibnet.us
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