Raise functional level of Domain

I am in the process of migrating our domain from Windows 2000 domain controllers to Windows 2008 domain controllers.  As it stands now there are 2 Windows 2000 dcs and 1 Windows 2008 dc.  Is it the correct process to get to the functional level of Windows 2008 to install another Windows 2008 server, make it a DC, and then Raise the Domain Functional Level on one of the Win2008 DCs?  At this point would I need to do anything to the old Win 2000 dcs or are they rendered out of service when I raise the functional level?   I need our domain to be at Windows 2008 for several apps including Exchange 2010.  Guidance on the correct steps and order will be appreciated.
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Darius GhassemCommented:
You need to move fsmo roles and demote the Windows 2000 Servers from DC before you can make the forest functional level Windows 2008 Server

Here is full guide


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pgreetisadaAuthor Commented:
dariusg, can I move the fsmo roles and try it for a while before I demote the other servers.  Also there are apps on those 2000 boxes that need to be accessible.  Do I need to kill services or will the demotion take care of that?  I can see that guide will is exactly what I need.  THanks for the help.
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Windows Server 2008

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