I just wonder - (Packet editing)

[devak]

If some1 ever tryed to packet edit using programs like PWE, in old times we did 1hit kill with programs like that editing the packet with the monster id, or playing an action like "skills" without been there.

and i didn't search, but i wonder how you know what you are looking for in the memory (in programs like CE) without kwnowin' what you are seen.

any tip to learn, like a tut or a good explanation in some where?

Ps. bad english rulez!