Adding Headers from Fireworks

Hi,

I just installed wordpress and it’s great. I’d like to add a header that I created in Fireworks (Macromedia) that contains roll-overs etc. I have it working, but when I mess with the code in the header.php it changes the look of the site. The sidebar resides at the bottom of the page and the blog text no longer centers… not to mention the background Image I’m using doesn’t show up.

Any help would be very much appreciated.

Thanks in advance!

Ross

PS: here are the url’s
The rest of the site I would like the blog to look like: https://www.lucilleweber.ca/
The blog; https://www.lucilleweber.ca/blog/