Editing Title screen graphics on Wii System Menu

[LilQuaz]

I want to start out by saying I have no modding experience, and don't know much of anything on the whole modding side of emulation.  I am trying a dumb little idea where I edit the graphics/title of a game to appear in the Disc Channel differently.  How would I go about doing this?  The game/channel actually being used doesnt really matter to me, I just want to be able to run it through the Wii System Menu in Dolphin.  Is this possible, and how hard/easy would it be to do?