It's too large a file to post here, but if anyone wants to take a look at it - and it's a nice little piece of work - it's an "open access" article that you can get here at no charge:
http://www.biomedcentral.com/1471-2474/7/91
If the link doesn't work for any reason, just drop me a PM with your email address and I'll send on a copy.
Mike