Hacking Channel loaders for each game on USB disk?

[snikerz]

So, with "wbfs mkhbc" it's possible to create a single .dol launcher for each game stored on the USB drive. I'm quite sure it's possible to rip the banners that appear in the disc channel when inserting the original game can be extracted from the game discs. Now we just have to inject the fitting .dol into each wad. I guess this would be the perfect GUI for the USB loader

So my question is: Has anyone managed to create an empty wad with just the banner of a game? Mind sharing a small tutorial?