If I remember correctly, you can download binary modules from ActiveState for the Win32 platform. However, if the desktop police won't let you do that, you need another solution.

If you have Samba running on both AIX machines, why can't you mount both drives on your XP box and do a direct copy? There are other ways of automating interactive command-line stuff with modules like Expect, but I would just use the tools that are available in your OS to do the job.