NavyLCDR said:

Cool little trick with Kyhi's recovery drive: take a standard Windows 10 install USB flash drive, copy the boot.wim file from sources from Kyhi's recovery drive to the sources on the Windows 10 install USB flash drive (overwrite the old file). Now your Windows 10 install USB flash drive will boot into Kyhi's recovery drive giving you all those utilities. If you want to install Windows 10, run setup.exe from the USB flash drive from file explorer. Bonus! Two drives in one!

NavyLCDR said:

I created a 6 GB FAT32 partition at the end of my second HDD. I mounted a Windows 10 installation ISO file and then copied all the files and folders from the mounted ISO file to the 6 GB partition. Then I mounted Kyhi's Recovery Tools ISO file and replaced the Windows 10 boot.wim file in the Sources folder in the 6 GB partition with the boot.wim file from Kyhi's recovery tools. Then I used EasyBCD to add that boot.wim file to my Windows boot menu. I have a Macrium Reflect image of my SSD saved on the NTFS partition of my second hard drive. I kept the regular Windows 10 450mb recovery partition on my SSD.
I can:
Enter the standard Windows 10 recovery environment from within Windows 10.
Boot the computer from the normal SSD and pick Kyhi's Recovery Tools to boot into.
Enter UEFI boot override and boot directly from the custom recovery partition on the second HDD into Kyhi's recovery tools.
Once in Kyhi's recovery tools I can do a clean install of Windows 10 or I can run Macrium Reflect and restore the backup image to my SSD.

dalchina said:

Hi, NavyLCDR has just posted this which includes command prompt sequence and much more - perhaps too much for this purpose, but covers issues arising rather well:
Installing Win 10 x64 using a flash memory - Page 2 - Windows 10 Forums
and Rufus instructions are in Option 2 of this tutorial, but refer there, of course, to a Win 10 iso.
Create Bootable USB Flash Drive to Install Windows 10 | Tutorials