I'm having trouble Emulating the Monsters inc: Scream Team.

i recently downloaded this PlayStation 1 game called Monsters Inc: Scream team and i am having trouble figuring out how it works, in the downloaded folder there are 3 files:CCD file
IMG file
SUB filei am new to this emulating stuff, and i need quiet a bit of help, anyone?

You will to download an emulator like psx or EPSXETry Psx first, as it comes all together:http://psxemulator.gazaxian.com/just download the 1.13 version,
unrar it, open the emulator,
go file, then open,
then go to the place monsters inc is in and click the file,
then click ok