If I understand correctly, you want to be able to access files on your core from your windoze box. If that is the case, then I'd suggest using scp instead of ftp. For command line, install PuTTY on your windoze box. For a graphical client, I think filezilla (from sourceforge) supports either sftp or scp.
If you must have insecure ftp access, then run "apt-cache search ftpd" to find an ftp server (there are several). I can't recommend any particular one as I've avoided ftp for the past few years.
Another option would be to share directories on your core using samba.