In the Inventor 2011 installation DVD, you find the file en-US\SetupRes\Docs\Adsk_Inventor_2011_PlanInstall.pdf which is the document you are looking for.
We recommend you reading as well the different readme files located in the same directory, you will find there valuable information which will help you in the migration process.
Regards
Antonio Barroca
Autodesk Product Support
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Antonio Barroca
Product Support Specialist
Autodesk, Inc.