First download http://www.mpgh.net/forum/164-combat...e_working.html this cheat engine that works...
Fine , for vest and backpack hack
1- equip light vest, search for 1 (exact value 4 vytes)
2- equip heavy vest, search for 2 ('')
Repeat 1 and 2 step till u get 60 adresses +-, then, just unequip both and look for the value that are different of all ( in my case , the value was 0)
Do same thing as the vest hack, but Standard backpack is the value 1 and the one that has 2 slots is the value 2.