Cheat Engine

[XCliffsideplayaX]

Um, I downloaded this file with Gunster.ct on it. But how do i inject it?In the forum, it says to right click, then put "change register to this location", but I dont have that button, it told me to do it on a certain zenx, but it still doesnt work on that. And,it says to find Gunster.exe(2), which I cannot find. On another Zenx Engine that I have tried to do on, i clicked change register to this location, it says "I couldn't attach the debugger to the process!You could try to open this process using the processpicker and try that!If that also doesn't work, check if you have debugging rights."
First of all,hats debugging rights. 2ndly, whats a processpicker? Im sry if i'm being a lil sassy, but it really gets u aggrovated if u try this for 3 hours and no results.So please help me!!!