Adding a WIndows 2003 domain controller to a Windows 2003 AD

I have an existing 2003 AD running on a Win 2003 PDC, which also acts as the data server, and several BDCs.
There is now the requirement for a dedicated PDC, running Win 2008 Std, to be installed immediately, but retaining the AD in 2003 format at the moment.

Please could you advise the best method to join a 2008 DC to the domain and how it should be set up to act as the PDC, with the existing 2003 servers as BDCs. The current PDC's hardware is unreliable, crashing regularly and need replacing.

Your help would be appreciated quite urgently.

Thanks
tcn_ltdAsked:
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jlindlerCommented:
The install should be straightforward.... Simply do not raise the functional level of the domain.

See this article for moving the roles:
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/2003_Server/Q_23193540.html
tcn_ltdAuthor Commented:
There is no mention on that Q regarding 2008, how exactly should the 2008 server be added to a 2003 AD?
jlindlerCommented:
Go into Server Manager, click on Roles.   On the right, click on Add Roles.   From the wizard select, Active Directory Domain Services and follow the steps.  
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Mike KlineCommented:
Take a look at this question I  helped with

http://www.experts-exchange.com/Software/Server_Software/File_Servers/Active_Directory/Q_26478329.html

You will prep your schema for the 2008 DC then you can promote the 2008 box to be a DC and you can transfer the FSMO roles.

...have you thought about going to 2008 R2?

The term BDC is not really used anymore (that was in the NT days) but I know what you are trying to say when you say BDC.

Thanks

Mike

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tcn_ltdAuthor Commented:
Thanks for your feedback. Just to confirm it is 2008 R2 and by following the advice given above, will the 2003 AD format still be retained, so long as I don't upgrade the schema level to 2008?
jlindlerCommented:
Correct....  The prep above will add some items to the scheme necessary for 2008, but as long as you do not raise the function level of the domain, your 2003 DC will continue to work.
Darius GhassemCommented:
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