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I need to run adprep /forestprep on an existing DC running Server 2003 Standard Edition (call this one DC 1) to extend the schema in preparation to add an additional DC running Server 2003 Standard Edition R2 (call this one DC 2). &nbsp;DC 1 is updated through SP2. &nbsp;Are there any other hotfixes that I need to install before running adprep? &nbsp;
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I need to run adprep /forestprep on an existing DC running Server 2003 Standard Edition (call this one DC 1) to extend the schema in preparation to add an additional DC running Server 2003 Standard Edition R2 (call this one DC 2).  DC 1 is updated through SP2.  Are there any other hotfixes that I need to install before running adprep?  

Hot fixes - adprep - Server 2003 adding Server 2003 R2

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).