Steps on how to play PS2 games online using a PS3?

I have a backwards compatible PS3 and am trying to play games online like Killzone, Madden, but I'm not able to connect online to play. Can someone give me steps on how to be able to play online ps2 games using ps3? Thanks for your time.

Can someone give me the steps to play my ps2 games online on the ps3 ?

I am want to know how to play my ps2 games online, but on my ps3. I am camping so i get a wireless Internet connection. So i just need the steps to play my ps2 games on my ps3.