Thanks for that - but coding really is completely over my head - no experience of it. I can move scripts, insert, copy paste, and perhaps tweak numbers - but I wouldn't know how to touch script otherwise.
However, I've just inserted something I thought would work and it actually has - now have a side menu with my own images. I don't know how to order them, but looking at the code in the thread referred to it's simply a case of moving snippets around in Subs.php.
Oh - and BIG
faux pax - when I came to altering the template I realised that it was actually <yabb menu> I needed to move,
not <yabb im>. Nearly a very silly mistake.
Happy now, though, and thanks again for your help.