POKE 23609,0
or POKE 23659,0

One of them was infinite lives for Manic Miner. I can't remember which.
( Smallbrainfield is looking for fellow Battlefield 3 players, on PC, Fri 22 Aug 2008, 11:09, archived)

poke 34269,30 gave you 30

( Cockweasle, Fri 22 Aug 2008, 11:10, archived)

POKE 35136,0
( kingsuperspecial is in an audience, wanking furiously, Fri 22 Aug 2008, 11:14, archived)