I can't help with parallax mapping, but I can point you to a few things that might be the cause for your confusion.
In almost all cases, you need a parallax lock script if you want to use parallax mapping. However, most parallax lock scripts do more than simply locking the parallax, so you need to set the additional options depending on what the specific script you're using needs.
That means that if a tutorial uses a different script, it's descriptions and what you need for the script you're using are most probably different - you'll need a tutorial that uses the specific script you want to use.
That said, please provide a link to the script you're using, I haven't heard about a HK Ultimate Overlay Mapping before - most people around here use different scripts, and without knowing where you got your script we can't even check what it might need for you.