araey on "Monochrome theme questions"

Hey guys, I'm currently using the Monochrome theme.

Here is my blog:

www.araey.wordpress.com

I was wandering with this white background, if it is possible to change it so that i am able to put a logo in the background?

If not is it at least possible to make the columns wider so they fill more of the whitish background? I just find it has alot of empty space that could be used.

I don't know anything about changing the coding so if it something that i need to do, any help would be great.

Many thanks,

Andrew