how to customize this overwhelming theme to 4 col?

hello dear developers

first of all – i am very happy to run responsive-pro theme

question how difficult is it to customize the theme towards this

http://www.stationidentification.com/

with:
four collumns

and if we open a link then we have this
http://www.stationidentification.com/free-gift/

how to do that? is this described anywhere?