The Tools

Second step: having the tools. These 2 tools are enough.

(1) The Registry Editor. I think everybody who uses Windows has it, and can be opened
by typing "regedit" in the run command. Or if you can't do that, go to Local
Disk\Windows\System32\regedit.exe.
(2) An executable decompiler. It is used for most of the tweaks. A powerful tool that can mislead you. They can be downloaded everywhere, and if you want to have one for free, contact me. The one I'm using in my screen shots is PE Explorer, from heaventools.com.

They're very powerful, and that makes them dangerous. I REALLY suggest you don't play with them.