Cheat Engine

[jappertje]

I'm no pro at assembly, so I could be wrong.

You should tick ZF [X] [ ] at the adress that jumps whenever you get hit (I believe in this case it is 123abc), to make you not get hit. (aka, godmode). Dieing is mostly stored on the server, and therefore not hackable.

Never understood the difference between [X] [ ] and [X] [X], so not able to awnser that.

the last question, ticking ZF would state the thing meant before, as untrue, so only at opcodes that jump under certain conditions it will work the other way around (like if there stands JE, there stands JNE)
So ticking ZF would work in all cases, exept JMP, because JMP always jumps to the adress, no matter what happened before!

Any1, feel free to correct me if I'm wrong on certain parts =)

[Labyrnth]

This will help you answer some of your questions.
http://pdos.csail.mit.edu/6.828/2004/readings/i386/Jcc.htm