I checked your theme. With your current theme I would suggest you put that in the middle and modify the header to have it look like yourgraphic header is in the center with like bars or something that can be repetative.
You can ask for people to do it here.. I know when I asked for someone to redo my header and redo the
HTML (as I somehow messed it up and it worked while messed up but broke when fixed) I got lots of people saying they could fix it and do the header for me.
lame quotes ? lol sorry.. I just had to point that back at you as I would of been the one you would of offended. :)
hehe, I gotta say this.. At least my themes work from 800X600 to damn near anything you can imagine. :)