How to do this think
Hehe, found HP

I figured it out after getting some sea plants. Some heal you and the give you.. tadaaaa.. HEAL +0.1.. So yea, it's a float

4B1D97 - fsub dword ptr [esp+28]
I'll play around with options. See what I can get..
EDIT: As I thought, it's shared

I dropped a boulder over a plant.. Didn't die.. lol..
EDIT: God Mode (tested on 1.0.3)
Code:
[ENABLE]
alloc(cave,128)
label(skip)
label(back)
cave:
cmp esi,[5EBA0C]
fld dword ptr [esi+1C38]
je skip
jmp 4B1D97
skip:
jmp 4B1D9B
4B1D91:
jmp cave
nop
back:
[DISABLE]
4B1D91:
fld dword ptr [esi+1C38]
dealloc(cave)