Thanks for the answers guys - I'm still working on it.
I've found some of the stuff - struggling with the rest.
The link from BOAC takes me to a chat between a bunch of people who know what they are talking about (I'm not qualified to enter the conversation on this topic).
The mail from Liam is more productive - but has an edge of geekspeak about it. I'm waiting for a tame geek to stumble by and do the deed.
I'll let you know how it goes - thanks again for the advice.