Cheats for Transformers Revenge of the Fallen Ps2?

does anyone know how to type in the cheat codes for transformers revenge of the fallen for playstation 2? online it says to go to the cheat code menu but i cant find anything saying anything about a cheat codes so if anyone can help me that would be awsome thanks.

Suggestion:

http://www.playstation2-cheats.co.uk/your_cheats/29522/Transformers_Revenge_of_the_Fallen_cheats.html
this might help