Hello! I bring news. Beside the introduction of 21H1 MCT ;)
First, I have added create media preset(s) that when used, will send you right at the select usb or save iso dialog.
And when booting from the media, the pick edition dialog will be skipped.
The attempts I've seen in this thread were mostly failing because /Pkey option is only meant for retail bought keys, not for generic / hwid!
To overcome this limitation script simply generates aPID.txtwith the key you provide and then adds it to the mediasourcesfolder.