PS2 Disk Format

I have dl’ed some games. Unzipped into an iso. Burned to disk. The PS2 says that I need a PS format disk. I’m not sure what I’m doing. I could really use some help. Thank you and Happy New Years
Answer #1
Does your PS2 have a Mod?
Answer #2
I don’t know what that means
Answer #3
A mod is an alteration on your PS2 than makes it run ripped games.
Answer #4
No … how do I get one of those?
Answer #5
Usually Swap Magic 3.6 is the cheapest. Get that.
Answer #6
No ... how do I get one of those?
Swap Magic should work just great:
http://www.swapmagic3.com/