Configure mail server software
install Windows 2000
install base software (as per the first sections of our 'Windows 2000 software installation' document)
configure operating system (as per our 'Configuring Windows 2000 for Performance, Usability and Security' document, using TWEAK (and some manual))
introduce to the Samba/Windows NT domain
install Mercury and Pegasus Mail. setup as per our 'Configuring the Mercury Mail Transport System' document (can copy and amend mail settings from an existing installation of Mercury) (but differing in that mail-server uses queue and saves mail on file-server)
make shares on file server to user mailbox and mail queue areas, for Mercury and Pegasus