PS2 game plays in black&white

[GJintheUK]

Thanks for the information, but I have some questions about it. I have never used a 'hex editor' before so these may seem very stupid questions. I have a copy of 'ultraEdit' which I am using, I don't know if this is any good for the task or not.
1. I can 'search and replace' the first string using the 'replace' function and let the program replace all instances it finds. Is this correct.
2. How do I find 'vmode =NTSC' if I search for it it appears on nearly every line. (it counted 67955 occurances) How do I know which one is in the 'system.cnf' or do i change them all?
Thanks for any help you can give me.