My b2evolution Version: 2.0x

I have the website: mymusicalfruit.com I like how things appear using the evopress skin except i have a lot of margin space that i would like to use. I dont need any widgets in there. Ill probably just stick a static vertical jpg. Whats the best way to do this, do i need to add a sidebar with a container? Can i just use dreamweaver to drag and drop an image or will that cause everything to be offset? Thanks