Don't worry - I'm a teacher so know where to look for the correct information - presumably you have found the admissions section of the Bucks website?
Here is a link if not:
http://www.buckscc.gov.uk/bcc/content/i ... =987793428
It's worth looking through the booklet - the new one will be posted on the Bucks site when it comes out.
You can easily DIY using the support on this website - as you are registered you can PM any other member which is sometimes useful if you have specific questions.
Good luck and keep posting -