Well, I can't see your picture yet, but this is the dashboard:
If all your looking for is to put a board around the image, then you'll need to alter the images, not the xml. Besides, there is not a lot that you can do, xml wise, to alter the Home Menu.
Also, you should remember, if you mess up the "rv_home.xml", it will put the HUB/SMP into infinite reboot, and it can be hard to recover from. For SMP users, I don't recommend experimenting with the Home Menu xml at all, becuase if you cause it to go into reboot you may never recover.
Anyway, the images to edit start with "main_" , such as "main_videos_icon_n.png", like I said, if you don't know what you are doing, edit the images, not the xml for the home menu.