Instructions
Check your game's manual or look at its specifications online to see whether the game you want to play is compatible with headset audio.
Plug the headset into one of the USB ports on the front of the PS2. On a standard PS2, these ports will be in the blue plastic square on the bottom left of the machine when it is lying flat. They are marked by the three-pronged USB symbol.
Start your game. Sound will transfer to the headset automatically, but settings for activating the headset mic will vary from game to game. Check your game's manual for details.