I was instaling the "fceux" emulator for NES games, and basicaly I install the emulator, and now I have this: https://docs.google.com/document/d/1zIuG9VuABgFw_WVE8WnDYfooMJKWHmdhlAskWYvE7go/edit?usp=sharing I have the tipical black screen with all the posibilitiesof configuration, cheats, savestates, etc. But it is all the time black, so I cant do anything, and, now, I dont know how to continue to can play something or to can do something Probably maybe I have to install and download another archive with the game I would like to play, but I dont know what or what archive... Realy, I dont understand so much about this Can anybody help me, pls?

You've installed the emulator correctly, now you need to obtain ROM files, which include the actual games. We can't discuss how to obtain those on the site because it's a gray legal area, so you'll have to look elsewhere.