Autoboot Feature
Each source menu button can be set to autoboot a game, homebrew app, or plugin rom/movie/song.
Just add autoboot=x to the source button.
For Wii, GC, and Channels set x to the game ID
For Homebrew apps set x to the folder name or if you use custom titles use the custom title.
For plugins set x to the roms filename or if you use custom titles use the custom title or if you are using the plugins database title use it. If unsure then browse your covers and then note the title that appears with that cover and that will be the one to use.
Here's an example of autobooting the homebrew app WiiMC: (note WiiMC must be in your Homebrew coverflow list)
[BUTTON_3]
image=Homebrew.png
image_s=Homebrewb.png
title=WiiMC
source=homebrew
autoboot=wiimc
Now when you click that button/cover in source menu/flow it will auto boot the wiimc app.