A lot of your questions are easy to change in the css.
The header:
You can find it in the css. It’ s called #topbanner
‘#topbanner {style.css (line 55)
background:transparent url(images/bg/home_banner.png) no-repeat scroll 0%;
border-bottom:1px solid #999999;
height:70px;’
Just change the height into:181px; end add an width:850px;
Go to the imagemap and get rid of the standaard image, replace it for yours. Make sure you use the same name as the standaard image; home_banner.png
You can use (morzilla)”firebug”-add on to seach for the right elements in the template that you want tot change. Firebug is very helpful.
To change te position of the search menu, you also have to make some changes in the css. It’s possible that your seach menu dissapears, because its positioned under your header(becouse your header is bigger then the standard).
I think you should read more about css. Download firebug ad you ‘ll be ok:)
