Can you play ps2 games on an un-modded PS2?

I've heard that you can burn an iso with dvd decryptor, and (using remove RCE protection checkboxes) it will work on your PS2... But will it work on an un-modded PS2 (doesn't have swapmagic, codebreaker, memor32, just Action Replay [non-evo edition])? I don't have any software to boot ps2 games except for Action Replay (NOT the EVO edition, so it doesn't have media player). So again, I ask will burning with DVD Decryptor work on my PS2 (It's not the newest version, in fact, it's like 6 years old, and it's a slim console)?