I was just wondering why all the systems (nes, sega megadrive ect) are all listed seperately.

Do you download RetroCopy V.0.945 and the download each emulator seperately ?

And are there any nooby guides for first time users - Or is it not that hard.

There are separate system pages because each emulator in RetroCopy is done to a high level. For all of the systems covered (excluding the NES) it is the most accurate emulation you will find.

Everything is included with RetroCopy (even some demo games to play) so there isn't much to it, just download and use!