If you found yourself in the position of needing something from the Vista installation disk, you can always raise a Command Prompt Window, and navigate to that location. For example you need the product key so you can copy - paste it rather than typing it by hand.

During the GUI phase of the installation you can press the SHIFT + F10 keys, and you will have yourself a Command Window. From this you can navigate to a text file, or run regedit.exe or any other executable Vista copied to the installation folder on the hard disk.

Thank you Daniel Petri, for this information.

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