Add Server 2003 R2 Domain Controller

We have 1 domain controller running Server 2003 and I would like to add a second one running Server 2003 R2 version.   Have seen conflicting information about running ADPrep on the original domain controller.  One resolution says to run ADPrep (from the R2 CD) on the original domain controller (non-R2) to apply the R2 Schema extensions.  Can anyone verify for me that this process works and will not crash AD or the Schema?

The error that I received when trying to run DCPromo on the R2 server was, " The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003.  Use the Adprep command-line tool to prepare both the forest and the domain.  
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Mike KlineCommented:
You have to do the forest prep on the schema master and

...and as you can see you get the version from disc 2 of the R2 set

"...Locate the version of Adprep, either in the \cmpnents\R2 folder of the Windows Server 2003 R2 Disc 2..."

It won't crash your system...well I've never heard of that happening.



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Here is a link to better explain-
rstorm1Author Commented:
Thanks, folks.  g000se, that link was particularly helpful, as it addresses compatibility issues.
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Windows Server 2003

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