HELP UPGRADE EXCHANGE 5.0 TO 5.5 TO 2000

I need to install Exchange 5.5 on another server, connected with an existing 5.0 server so I can migrate all my users and folders to the new app. on the way to E2K server. The error message I get says to “Install Exchange connector on the 5.0 server. The 5.0 installation guide also says to install this “Connector”. Anyone ever had this elusive Connector CD that Microsoft issued? Can I get a loan of it or buy it from you? Microsoft’s not been very helpful.

Thanks,

Jeff