Hi Biterider!
The trick for me was to use the Virtual Machine USB Boot program
I know existence of that trick. But it's a hack from 2013 that perhaps only work for VirtualBox of that time. I never tried that.
I pointed you to a easy current trick
before, and that work. VirtualBox think that USB is a Hard Disk, and you see in Shell UEFI configuration like a Hard Disk.
Anyway, now I see the problem probably it's not related to USB

Multiprocess is about multicore systems, and you have only one core!!
This mean CPU2, then you have also CPU0 and CPU1 (at least 3 cores):
mov tcb.ProcNum, 2
HSE