JA and Felu: What could newbies screw up? I don't get it, the script checks if the offset is correct before patching, so no need to worry.
And now over to Cookie...
This tutorial was written to find offsets for the script, not editing the memory itself, that was just for testing if it was the correct address (though it's possible that way).
I was using OllyDbg for myself, but writing a disassembler/debugger tutorial is just too advanced. So I found Cheat Engine, and it worked while it was pretty simple. That's why I chose to describe that method in the tutorial.
In the address field, the address is in hex, so we add 0x so JScript reads it as a hexadecimal number.
I used Cheat Engine, and I found the exact address as already used in the script, so it's proper. It might not work every time, but it has worked so far (haven't tried WLM 9 as I'm not a tester).