Timesplitters Future Perfect Cheats for GameCube

In the mexican mission, there is a spot that you can stand where no virus can touch you. When you go to the roof of the building, and you go out onto the ledge over looknig the whole outside, you can go right or left. Go left and go towards the cloaking pickup. If you continue down that same top ledge, you can sit there for as long as you want. The PC's are to stupid to walk that far :D

Unlockables:
Big Heads cheat: Beat Outbreak Hotel
Fat characters: Get bronze on Communing Will Kill You
Human Gun Sounds: Get bronze on Cat's Out of the Bag
Old Film cheat: Beat I Like Dead People
Rotating Heads cheat: Beat Brain Drain
Paintball cheat: Beat Time Splitters Underground
Spinning Heads cheat: Get bronze on Beahead the Undead
Zombie Monkey: Get bronze in Brain Drain

Unlock 8-Bit Cheat:
Earn a medal in the Screw Loose League Challenge

Unlock ALL Characters Cloaked Cheat:
Earn a medal in the Queen of Hearts Challenge
Unlock Anya:
Complete 'Time to Split' on Normal difficulty setting
Unlock Arthur Aching:
Complete 'Mansion Of Madness' on Easy difficulty setting

Unlock Aztec Warrior:
Complete the challenge 'Avec Le Brique' with a Bronze medal or higher

Unlock Badass Cyborg:
Beat the Cut-Out Shoot-Out Challenge 'Balls Of Steel'

Unlock Berseker Splitter:
Finish 'The Hooded Man' in Easy difficulty setting or higher

Unlock Big Hands Mode:
Complete the challenge 'Cortez Can't Jump' with a Bronze medal or higher

Unlock Big Head..

Firstly destroy the big gun on its back because this will take the most damage out of you. Make sure you use the minigun on it because it will be alot easier. Then destroy the little guns on its sides and finally destroy the things that fire plasma grenades. By the way if you run out of ammo in your minigun use your plasma autorifle.
The very last boss is even easier!Just disable its guns first then destroy its feet, and bingo!Go round the back and blast it to bits by sticking a rocket on your K-SMG!Repeat this about 3-4 times and youve completed the game!
I really could go on all day going through a complete walkthrough as ive completed it on easy normal and hard and nearly done all the challenges and leagues. I found it easy but im not sure about you lot though.