i have the PS2 game but seems to have encountered several "glitches". i have Action Repaly codes for Infinite Health and Unlock All characters. but (as i have read about the said game) im not able to "meet" the final boss Night Terror for some reason. and i am made to beleive that it might be that some of the codes might be "affecting" it. is this the case always? any experience with this? are there any "updated" codes? any sugestions on what can i do?