I just bought PS2 slim 90004

Hello! Today I bought a PS2 90004 from 2009. I'm pretty happy with it. Тhe previous owner told me that the console was chipped. When I started the PS, the screen displays 4 red buttons with exclamation marks on them and written a message about being unable to load config file.
Than I saw this video:


..and the problem was solved!

But now I have a question how can I take advantage of the fact that the console is chipped and upload new games?

Thank you in...

I just bought PS2 slim 90004