I think thats where we have got confused in reading stuff on here.
A theme to me, is a proprietary set of templates that form a overall theme which when styled with css gives you representative website look etc.
Do you mean , and when I have read other Q&A by theme, an "include" of sorts?
similar to dynamic inc: such as :$footer etc ?
Will have a nosey round, am presuming then all we would need to do, is create our own "menu" and remove the call function for existing nav ?