You are looking for a Front-End. There are a number of different multi-emu frontends available, the best way is to try a few and see which you get on best with.
Popular free ones are mamewah, emuloader, and Mala, you could also look at offlinelist.
Shareware ones to look at (the basic prog is free but you pay for the full version) are Maximus and GameEx.
All will provide a common front-end for your emulators and allow you to pick your games from a list featuring screenshots, other artwork, music, sounds and movies dependent on how you want to set them up.
Give some a try and when you've decided which one you want to use if you get stuck post again for support.
You can set any of these up as your Windows shell (basically windows will boot straight to the front-end instead of launching explorer and booting to your desktop), a far easier method is to put a shortcut to the front-end .exe into the windows startup folder and use software to change your windows startup and shutdown screens.