I have installed Hatari and placed a few .st game files within my hatari/fd folder. The boot up process and desktop look like the first two pictures in this link:http://tinyhack.com/wii/hatari/
I go through the menu and choose the game I would like to play within the disk screen. When I choose "okay" I go right back to the desktop screen. I am not sure what else needs to happen to start a game.