Yea, there must be. Check ebay, usually it would be a gameshark looking thing you plug in, dont have to open the PS2 system and get your solder iron out, lol.
Is there sumwhere I can d/l a boot disk? I bought this PS2 off my m8 and it's got 1 of them older mod chips in it but I can't use it coz he's lost the disk -.-