Microsoft Print Migrator
Automates the backup and restore of print configuration data. The Print Migrator application was designed to be a small utility, which automates the backup and restore of print configuration data on print servers.
Print Migrator 3.1 continues full support for print servers running Microsoft Cluster Services; support for migration between different version of Windows (for example, Windows NT 4 to Windows Server 2003); and support for conversion of line printer remote (LPR) ports to the Standard TCP/IP Port Monitor on Windows 2000, Windows XP, and Windows Server 2003
To run the Printer Migration tool, from an elevated command prompt run PRINTBRMUI.EXE for the GUI version or PRINTBRM.EXE for the command line version. PRINTBRM.EXE does not appear to be included in Windows Vista or Longhorn Server yet. I've not had a chance to check out the latest Longhorn Server CTP but one would assume that it will be there before RTM.
Print Migrator will stop the Spooler service on the target machine so it can update driver files; you therefore need to be a member of the Administrators or Print Operators group to run the utility. Remember to run Fixprnsv.exe first, though, if you're migrating an old Windows NT print server to a newer Windows Server 2003 machine.
The license of this software is Freeware, you can free download and free use this printer software.