This site is excellent for any queries or info on addictions of any kind, it's a really excellent source of support for addicts, friends or relatives.
http://www.soberrecovery.com/forums/
This may be of interest too..
http://www.nwe-ukna.co.uk/meetings/
Now it's out in the open she will have your support and I hope she can beat her addiction, she's lucky to have such a caring friend.