First of all: why do you post in the BH section a post about OBH? Maybe some admin will move this post.
1) (what's the problem? OBH is very simple)
MENU/Backup menu/Full backup
Green button for a new backup. But, before that, just choose the device by MENU (while you are in the above section, of course).
Have you tried at least once before asking?
In case, the important and useful thing about OBH Full Backup is that you can schedule it in this same menu.
Now SAVE and (as you see, reading) press BLUE to flash.
So the F.B. can be saved everywhere and you'll flash from there, in the future, i f you need to restore.
2) Picons for OBH are exactly the same of the ones used by BH and all other images.