This game is a buggy piece of crap and I stopped 20 minutes into it. CodeUnique has eboot codes for ammo and grenades already.

Health Never Decreases
0041993C 60000000
SET OGP=FC00602ED00B0004
SET COP=FC00602E60000000
I was still able to blow up vehicles and kill enemies with headshots.



Max Money On Gain
00546CB4 3C007F7F
SET OGP=813E80203860000080010074
SET COP=813E8020386000003C007F7F