Windows 2000 - preparing for domain upgrade

Archived from groups: microsoft.public.win2000.setup_upgrade (More info?)

We have 2 Windows 2000 domain controllers and a Windows
2003 database server.

There is a method of preparing a Windows 2000 domain
server for upgrading. It involves upgrading the schema
master using 'adprep /forestprep'
and 'adprep /domainprep' along with the Windows 2003 CD.

Right now there are no plans to purchase Windows 2003 for
the 2 Windows 2000 domain controllers.

Is there any advantage to preparing Windows 2000 domain
controllers for upgrade without actually upgrading them?
ie: Integration with the Windows 2003 database server,
added funtionality, etc...