Ok, I can help u with this one.
First of all there is hope!!!
U have options:
A. Buy a Jspec PS2 and game (too much money)
B. Buy a Gameshark and hack it in with a code (not bad idea, its what i did)
C. Find someone who'll loan u their Gameshark and do hack trick. (supa-cheap)
PS. I assumed that you have the NA version of the game.