Required:

Folders with games in them - Name these the name of the game, because that's what it will display as in the launcher!
A folder named "EXE" in all caps - This folder contains the emulator.  Without this folder, you'll never be able to run any of the games!!!


Optional:

controller layout.jpg - 640x480, mostly to have a picture of the controller.  See the included Genesis example; the white box on the right hand side displays text if you use controls.txt, and for the last two lines in the file put 375 and 60.
system.bmp - any size.  A graphic of the system.  The image shown will be transparent, although the transparent color is chosen by whatever color is in the lower left-hand most pixel - try to make this a bright color so it doesn't match anything in the image.
