Hi Julian,
Additionally refer Note 1480765 - MaxDB: system copy of SAP systems to Windows 2008 (R2)
This note describes procedures to migrate systems from Windows 2003 to Windows 2008/Windows 2008 R2 in order to prepare an upgrade to an SAP release that is based on SAP NetWeaver 7.3 or higher and is supporting Windows 2008/Windows 2008 R2.
After the copy procedure, the SAP system runs temporarily with this configuration, only for the purpose of preparing for and running the SAP upgrade!
Hope this is also useful.
Regards,
Deepak Kori