Facebook Group Wall on wordpress

Hi

Can anyone help me find a way to display a Facebook “group” wall on my wordpress site?

I’ve done loads of searching but it all I can find seems to only work for Facebook fan pages or personal ones, I need one for a facebook “group”

I’m taking over this site from someone else and I’m a total beginner, so sorry if this is really obvious. The old guy had a “insert php into a widget” style thing that displayed the facebook group wall, but I accidentally deactivated it and now I don’t know how to get the code back/make a new one?

Any help is greatly appreciated!

Thanks in advance!!!

Jack