That's exactly what I was hoping for.
When you say "I'm not sure its not possible", I am probably naive but wonder why?
I do have a 64G USBKEY that autoboots with another companies image based restore software already.
The problem is that although the software runs and I have manually copied the previous backup on to the USBKEY I still have to define SOURCE and DESTINATION.
Another problem is that the software is buggy and very unintuitive making it very easy to screw up.
I think if the EMERGENCY VEEAM USBKEY WIZARD makes assumptions of being just a bare metal restore option not much could go wrong.
I mean if VEEAM endpoint software was script driven (I don't think it is) on boot a simple syntax like c://veeamendpoint.exe
-cc "You will lose all data please confirm restore Y"
-r meaning RESTORE, -cc meaning confirmation comment
The only problems I see are storage size of USBKEYs and format structure. NTFS would not be available (no external USB hard drives), just EXFAT32 formated USBKEYS.
The wizard would have to check the users key for EXFAT32 and if large enough for backup + WEEAM AUTOBOOTING OS.
Heck, you could sell 64/126G USBKEYS with your logo and software all set ready for a one time backup...