Thank me, hang me or whatever.... anyway:

These are'nt listed in any particular order but they have all been tested and they work.

NOWALLS - Better craft handling.
COLLIDE - Old Wipeout collision dectection.
DROIDS - Replace playable craft as Rescue ships.
HITOMI - View both WO3 & Classic Leauge FMV's.
AXCEL - Faster speedpad's (changes colour as well.)
CRAFTS - Unlocks all craft.
MIRROR - Unlocks flip track option in options.
UNLIMIT - Unlimited weapons (press [] to change selected.)
NOFEAR - Unlimited shields and thrust.
NOPAIN - Unlimited thrust only.
ALLCNG - All challenges unlocked.
ALLTNT - All tournaments unlocked.
ALLTRACK - All tracks unlocked.
PROTO - Unlocks Prototypes.
PHANTOM - Unlocks Phantom class.

Two ways to unlock Establish Link:

LINK - Unlocks Establish Link option in options.

Or

Press start at main menu.

All cheats have been checked and verified by myself.