WY, am on a different laptop so can't get to the original design until after weekend but if you want to have a crack at a new banner, best thing is to save my banner (right click view image and then save), upload it into photoshop and then just save over it with a blank canvas and set the ruler guidelines on photoshop, of the banner, to fit within the areas which can be seen on the site, thats how i got the text to fit perfectly and ledleys head
Plus as YV said, keep it fairly simple as everyone loved my design when they saw it, but to be honest even i was a disappointed when it actually went up as the white area bit makes the banner lose some colour/design as i should have used smaller images and made it look fuller, or just more simple, which is why its started to looked tired as all you can see are too many empty areas or half of ledleys head etc, wasn't how the banner was meant to look.