How do you use ScummVM?

Ok well see I have Monkey Island 1,2, and 3 downloaded and all of them dont work (except Monkey Island 3, but it has no fucking voices, grr.) So I heard about this ScummVM, and I download it, but I dont know how to use it. I mean when it says add game, it takes you to these directories, and I dont know how to get my games into them. If anyone can help, it will be appreciated, thanks.

When you click add game, go to the directory that contains the game you want to add. The name should appear in the upper window if it finds a game it recognises then you can add it.

Try reading the ScummVM documentation.

What kind of downloads are we talking here? .iso images or were they just a zipped up game directory?