Anybody knows where to chip my ps2?

hi, i have 2 ps2's, one of them is slim and the other is slimline. I plan to trade in my slimline and all of my games and buy a xbox 360. i have these games i bought from bangkok that dont work on my slim or phat ps2. anyone know where i can chip my phat ps2? i live in Australia,sydney,mascot. i don care if my ps2 if my ps2 is at a risk of being stuffed up. i just want to have a chance at playing these burned i have. so plz help me. Where/how can i play burned games fro bangkok on my ps2??? thnx 4 helping