Thanks Webstral.
If you haven't already, it's definitely worth your time to peruse the site from which I got the RPG-7 information
http://world.guns.ru/main-e.htm
It seems to be a bit of a favourite for a few other people here and the Olive Drab site
http://www.olive-drab.com/ has a sort of miscellaneous feel to it but still has lots of good info