I'm a professionalist and I want to say that at least two steps of this article are completely wrong.
The wire that is insulated in white is connected to a microphone which in CTIA standard should be connected to the last port on the plug. The author did it opposite. Then as follows: yellow wire together with mic's screening are ground, next red wire (right signal) and last is green wire, wich is left signal should be connected to the thinnest pin.
Secondly it is impossible to open the remote without a harm if you follow this guide's steps. The author clearly damaged the remote while doing so. You need to simultanously pry and gently push certain parts of the the remote.