How can i play my Backup PSX games on my PS2?
 

The name of this thread pretty much sum's it up. Any idea's?

Try installing a modchip, A Messiah or a Origa-Chip would be the best choices depending on what console you have.

Preferably without a chip, a boot disk or somthing.

There are several different boot methods posted at www.ps2ownz.com. Again, the smartest choice would be to install a internal mod, the alternative to this is to possibly damage the PS2 by ramming a knife or card into the console. (Absolute stupidity!!)