THemes: Corked Screwer

Please help me. Maybe I am not techy enough for Drupal, but I just want to set up my site to look exactly like the Corked Screwer, and I don't know how??? I have pics ready to go to replace the ones that came with it, but I just don't understand how it works at all :(

Can anybody help me? my site is www.boatingbuzz.org

Also, I would like a built in directory on site, not of the site and my articles - but like an add on dbase maybe where I can have a look up and search directory of marinas, boat builders, etc.

Apologies if this has already been covered.