Apply SBS2003 R2 Transition Pack to SBS2003 SP2

I'm attempting to install the SBS2003 R2 Transition Pack to a Server running SBS 2003 with SP2 installed.  I can't get it to run  - the suggestion being that I need SP1 installed (surely SP2 should qualify).  I would welcome any helpful suggestions (at the moment, I understand that I would need to uninsatll SP2 and then try again).
Once I've migrated to SBS2003 R2 and Transitioned, I intend to promote a second server that has been installed as a Windows 2003 R2 server with Exchange server and SQL 2005 to become a domain member (which is currently not possible) and then change the FSMO roiles, migrate AD and DNS etc., move mailboxes and decommission the old server (public stores replicated, SQL databases and data files updated daily)..
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MesthaConnect With a Mentor Commented:
If you have a server with Exchange installed, then changing its role while Exchange is installed is not supported. It will break Exchange. Once Exchange is installed, if it is a member server then it must stay a member server.

Oh and it is possible to have more than one domain controller in an SBS network, the only thing you cannot do is move the FSMO roles off the SBS server.

Cris HannaConnect With a Mentor Commented:
To the author
There is a very specific SBS Service Pack 1 which includes Server 2003 SP1, Exchange Server 2003 SP1 and so on.   But there are other pieces to it.  Where you are already at a higher service Pack (i.e. Windows Server 2003 SP 2) you're ok, but you're still missing the SBS specific service pack 1 piece.
You don't need to be transistioned to install the second DC.  You can introduce another DC in an SBS environment, install Exchange (standard from non SBS media) , move mailboxes, move Data, install SQL then transferr the FSMO roles and shut down the SBS Server.  Of course the new Server needs to be DNS server, Global Catalog Server, WINS, DHCP, etc.   That all needs to be done before the SBS server goes away.
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