i'm rebuilding our site at the moment to move to joomla 1.5.

I really like out current template but unfortunately it cant be moved over so i'm editting the new template to suit.

What i'd like is a main menu background like here:

Kibworth CE Primary School - Home

and fit a similar thing on this one:

Welcome to the Frontpage

I can't seem to do it. Anyone point me in the right direction? I'm normally pretty good with these things.