That's probably due to the absolute positioning that Vector's css uses. You'll have to add some extra css of your own to tweak the top position of stuff, or add a relative positioned wrapper around vector's normal content to contain the absolute position within a box you can push down.
Yes, I think I need to look at some CSS and re-position.
A quick question - Bill's way of adding a header/banner is just to write some HTML directly after the very minimal PHP code as per your tutorial (i.e. after "class SkinZedDocs extends SkinVector {", terminated). This is a much smaller and simpler file obviously that copying all the template code from Vector.php. If one only wants to add a banner/header to the output, is there any reason to do it the "long" way over the short and sweet way?
Cheers,
Alastair