Try this...
Hey Viper try this website and maybe you can find it of some help... I did but unfortunately all these modchips seem to suck... like the Messiah Modchip the one every1 is interested in... I checked all sites that carried it and it seems like none of them have it in stock, instead it says Pre-order it... and that has been on there for like the past year... you could try others but you'd have to get a gameshark or action replay and do the little swap thing and then you have all this other stupid stuff that comes with it.. I honestly don't see a point to get a chip yet... I mean it's a great idea, because I have one on my Playstation, but also for PS2, you need dvd-r's mostly to play the backup games and that's just asking for a bit of money and hassle, if you're all in for it though (and it will pay off in the end) and you can find a site that sells a good chip for no BS... then do it... however in the meantime check this out and this might solve the question for your version stuff!
h**p://modchip.psxforum.com/playstation2.php