You'll need to set up all your emulators and roms seperately then once that's done what you are looking for is called a Front-End. Basically a games menu that shows a list of all your games with screenshots with a different background for each system.
Ones to look at include:
Mamewah, Mala, Gamex and Maximus. All multi-emulator front-ends that do what you want them to do.


Reply With Quote