I don't remember where I got mine-all the sites pretty much look the same. What I did was do a search on ps2 and modchips on google. You have to know what model PS2 you have because they are all modded differently. Usually the website will tell you how to figure that out. Like I said, it's a risky procedure, you can fuck up ur PS2 which is why I bought my preinstalled. If you don't do that, I would have someone experienced with a soldering gun do the work--it's not easy. Even with external modchips, usually it requires that you install a wire internally. No matter what modchip you get, you're gonna need a gameshark, because you have to do a swap trick in order for the game to load. It sounds all complicated but it's not, just do some searches on google and you'll get all the info u need.