Making forum float according to screen resolution

[setishock]

I'm ripping my hair out trying to figure that one out. Don't have much hair left so would some one tell me how to make the forum fit the screen at different resolutions? The logo header is the big issue. It was made at 1640x139.
I'm not a coder so if you would please make it simple.
Thanks in advance.
Here's the site if that helps. www.animeappeal.com

[ssslippy]

Seperate your logo into 2 parts. One part aligned left the 2nd alrigned right. Then just use 100% width, however you really should shrink your logo its quite big. You can do this in paint.