The title says it all.
Emulators ? For what ? the GCW-Zero ?
You play PS1 games on ya zero with pcsx4all here :http://boards.dingoonity.org/gcw-releases/pcsx4all-2-3/
A PS1 bios is recommended for better compatibility but not required.
But then, you need the ga(y)mes.
You'll have to buy them on Ebay or Amazon or maybe your friends have some.
Then, insert the psx disc to your cd drive and dump it with ImgBurn.
Then make sure to put some oil on ya disc and light it up.
congrats ! you have a iso file that can be used with a psx emu !
As for PC games.... lol