USB boot to install other OS

I’m looking to use the native OS installer to load OpenSuse for arm. How do I boot from USB flash drive? I have not found any instructions on the documentation.

1.First you need to make sure that the OS is VIM4 compatible.
2.Then erase eMMC[]=emmc#tab__cli-mode
3.You can use the tool below to burn the firmware to your USB devices.

I don’t think you are getting what I am after. I have an OS install usb thumb drive ready for booting. I use the same drive on my Raspberry PI to install OpenSuse. If the hardware is in the linux kernel, then it will load just fine. How do I select USB boot device to trigger the bare metal install? Or am I stuck having to get a SD card just to do an OS install?