How do I add other stuff to my site? logos, links, banners

[youppi]

I used the phpbb instant forum thing on my site, I have that now. Now I want to make banners and other things on my site at the top and sides of the forum. How do I do this? Please help. My site is http://talkdomains.ca
I want to be able to add like a site logo, banners, maybe other links at the top etc, just like other websites. This is a good example:

http://forums.redflagdeals.com/

Please help, thanks.

step by step too