Hi! First of all, nice theme, thanks!
One question regarding a header image: what would it take modify theme to have a header image, a bit like on the [url=http://pohjois-tapiola.com/lukio/]demo site[/url}, really.
Would CSS be enough or is there need for some modifications on template files? I've learned basics onboth (CSS & PHP), but a little nudge on the right direction would go a long way. :)