I am assuming that you don't really mean that you don't want to run WIMBOOT...
If you dont want the XML choice, then as soon as you see the message to press ENTER quickly to run Repair\Setup then just press ENTER quickly.
The alternative is to copy the Windows Install ISO to some other folder (e.g. \_ISO\WIN).
The keys used are general purpose installation-only keys. They are perfectly 'legal' because they cannot be activated. They are for installation of Windows only and are actually made public by Microsoft for that purpose.
Subject Re: disable Wimboot