What do I need to play foreign PS2 games on my American PS2?

[Jeffryoun]

I want to play Super Robot Taisen Alpha 3 on my PS2, since my emulator goes SLOW with it, but, I don't know what all I need in order to play it. Do I need some Foreign Game Chip? Or do I have to buy a Japanese PS2

[Acreon]

Google ps2 mods, you should be able to find a good how-to then.
It's fairly simple, it's just a chip if I remember correctly.
have fun with SRW!