Advertisement placement

Hi, I have been using wbb3, while I am no expert, I was able to place advertisements pretty much anywhere I wanted in the 3, but the template system in 4 kinda confuses me, why are some the same as the ones in wbb3 and some have wbb_ in front of them? These seem new to me. I know one is for burning board and one for wcf, but still. For example, I was like completely unable to get an ad to show up by placing it in the header template, although I tried the same things that worked in wbb3.

I think a great idea would be to write an idiot-proof step-by-step tutorial on placing ads in wbb4. Just a suggestion