In the PAL version some cheats have changed, or got an other effect. Simply enter the codes at the code menu.

Code	Effect
BDGFK	Double MPG (MPG = Miles per gallon)
CPPLM	Invulnerability
DRWCV	Unlimited fuel
FCQWH	Unlimited ammunition
GZXCV	Unlocks all missions
JYMNT	Stealth Mode (but you can't shoot)
KPLYQ	Unlimited attempts
PCPNL	Quadruple damage