No. Not really. Usually, you have to find a special file that allows you to play the disks. I know that the PSOne file is something like SCPH1001.bin, and it is EXTREMELY hard to find. I don't know of any other ones.
Listen, emulators are a pain. A knife-stabbing pain in the back. I hate them. If you want to play a console game, then get the system. You will get ultimately frustrated if you try to get an emulator to work CORRECTLY.
Sorry, but I've been mad at emulators and emulating ever since one had a virus on it that wiped my hard drive... That made me so angry I could have killed someone (but I didn't
Sorry if that was harsh...