How does one do buttons such as the Ludovic’s hide button in this thread, the 5th one down?
If you mean the spoiler box, you type [ spoiler]text you want to be hidden[/spoiler ], without the spaces inside the brackets.
If you mean you’d like to do other buttons, I don’t believe they’re supported by our version of vBulletin. The new spoiler box in coded in. See the New Spoiler Tag thread.