I want edit an existing minecraft texture pack, how? - 1

I want to edit this texture pack http://www.minecraftdl.com/faithful-64x64-texture-pack/

and its really good but i don't like the cobblestone. Is there a way to pull the cobblestone texture off of this texture pack http://www.minecrafttexturepacks.com/runescape-pack/?

a detailed step by step guide would be great, thanks

Typing it would take too long. Make sure you have WinRAR Installed (The demo works fine, it doesn't have to be the full version that costs money)

Just watch this video (Click the expand in the bottom right to make it bigger) -