How do I make my CS all fancy-like?

May I kindly refer you to the BBCode page on the Iwaku Help section? It has the BBCode applicable for this forum and with the codes and examples.
 
If I can throw in a tip of my own... if you quote a message and then switch to the BB Code Editor (in the message box there's a button in the top right corner for this) then you'll see all the coding that the other person used. If I see something that I like the look of, then I'll do that to check what particular piece of code they're using, and then I'll just make a note to use it myself.