Firstly, Geoff thanks for the board update, I'm sorry to hear that you have a ******* infesting your servers. I do hope they get what's coming, its a scourge we all face.
Don't take this the wrong way as I'm am merely offering a suggestion based on my experience of administering PHPBB, and I'm sure you are already aware of it. But after you are happy with the look and feel of the board, you will save a lot of bandwidth by cutting the CSS in 'overall.tpl' and putting in an external css file. PHPBB is a hefty piece of software and it does cut the bandwidth used dramatically on a busy board such as this.
Hope that helps.
FACT: More people follow County football than for any other reason