All the emulators included are fully working and will play all the Roms you now own. I would advise that you Copy the full folder over to  My Documents to Store the Emulators. The Only Emulator that has an install option is the Nintendo 64. But all the others need to stay in the folder they came in. Just put a copy of the .exe file to your desktop so you have fast access to the file.

Enjoy!!