Hey all if you use artmoney (or any other HEX editor) you can edit the values of your life and opponent life on the steam version... I haven't narrowed it down completely but I know the addy's that worked for me, it wont update right away but in one hit you can kill them. These are the addy's I got for opponent life; 17E0717C, 17EA329C, 17F3F3BC, 17FE54F4, 1808169C, 1828A734, 18591E14... It is late here so I am not going to narrow it down tonight just wanted to pass it along.
Seeing that the game uses DMA (Dynamic Memory Allocation), I feel that your help is not that helpful at all. You need to find out what code actually writes to these addresses and then post it here, with the instruction and its address (Which does not change).
I don't know how to do this in ArtMoney, but I recommend you do this in CoSMOS, which is the best tool available for gamehackers.