Jak 3 cheats and cheat codes for Playstation 2

Cheats:
Buy the following cheats for the indicated ammount of PO's (Precursor Orbs) 
in the Secret menu. Note: You have to complete the indicated acts, to 
purchase cheats:

Bad Weather: Buy for 5 PO (Complete act 1-1)
Big Head Mode: Buy for 3 PO (Complete act 1-1)
Blaster Damage Upgrade: Buy for 6 PO (Complete act 1-9)
Dark Jak Invisibility: Buy for 25 PO (Complete act 3-11)
Fast Movies: Buy for 5 PO (Complete act 1-1)
Increased Blaster Gun Ammo Capacity: Buy for 4 PO (Complete act 1-17)
Increased Peace Maker Ammo Capacity: Buy for 4 PO (Complete act 2-19)
Increased Scatter Gun Ammo Capacity: Buy for 4 PO (Complete act 1-17)
Increased Vulcan Fury Ammo Capacity: Buy for 4 PO (Complete act 1-24)
Unlimited Ammo: Buy for 50 PO (Complete act 3-11)
Unlimited Dark Jak: Buy for 50 PO (Complete act 3-11)
Unlimited Light Jak: Buy for 50 PO (Complete act 3-11)
Unlimited Vehicle Turbos: Buy for 30 PO (Complete act 2-25)
Invulnerability: Buy for 100 PO (Complete act 3-11)
Jak 3 Model Viewer: Buy for 2 PO (Complete act 3-11)
Jak And Daxter Model Viewer: Buy for 2 PO (Complete act 1-24)
Jak 2 Model Viewer: Buy for 2 PO (Complete act 2-25)
Mega Scrap Book: Buy for 2 PO (Complete act 3-11)
Mirror World: Buy for 5 PO (Complete act 1-1)
Peace Maker Increased Radius: Buy for 6 PO (Complete act 2-19)
Rachet And Clank Gun Courses: Buy for 6 PO (Complete act 2-12)
Scatter Gun Rate-Of-Fire Upgrade: Buy for 6 PO (Complete act 1-9)
Scrap Book: Buy for 2 PO (Complete act 1-24)
Slow Movies: Buy for 5 PO (Complete act 1-1)
Small Head Mode: Buy for 3 PO (Complete act 1-1)
Toggle Jak's Goatee: Buy for 2 PO (Complete act 1-1)
Upgrade Vehicle Toughness: Buy for 15 PO (Complete act 2-14)
Vulcan Fury Damage Upgrade: Buy for 6 PO (Complete act 1-17)

Unlock different colored costumes for Jak:
Collect all 600 Precursor Orbs

Tips:
If you're in Haven City on a zoomer and about to crash into the wall, jump 
off at like 4 inches away from the wall and nothing will blow up in your face.