If U-Boot is already installed and running on your board, you can
use these instructions to download another U-Boot image to replace
the current one.

Warning: Before you can install the new image, you have to erase the
current one. If anything goes wrong your board will be dead. It is
strongly recommended that:
- you have a backup of the old, working U-Boot image
- you know how to install an image on a virgin system

Proceed as follows:
Note: Included topic
DULGData_canyonlands.InstallUBootUsingUBoot? does not exist yet