[S4L]Problem With Cheat Engine

i wan to change my weapon to another weapon and I read a thread on pvper it said u only need to change the code to the weapon u wan like 2000003 change to 2000004 but when i enter the room it not working at all, or anyone else can give me a more good program to change the weapon??

You must freeze the adress.

how can I freeze the adress ?? can you give me any tutorial for freeze adress or some stuff like that ??

change values then click leftside from the adress in the box

I still no get it, u mean press Active button or ...?? can u make a photo for me pls??