I have the OCT file, placed it under the \office 2010\Updates\ folder. I have done the package in SCE 2010 and used the installation parameter "/p \\servername\office 2010\Updates\Office2010.MSP /qn"
Using a KMS key and that is reflected in the OCT file (by default). Trying to deploy on XP sp3 machine with office 2003 already installed. successfully deployed to the same machine some interactive microsoft guides.