Welcome to RR Geogre, here is a Sticky thread by a fine chap called Ninja Stoker an AFCO bod. http://www.rumration.co.uk/cpgn2/Forums/viewtopic/t=9503.html
All the other posts in newbies with Royal Marines in the title may be worth a deckco.
The site has a search menu,which is good and this may prevent you from asking questions that have already been asked. The Search icon is at the top right of the page.