well your getting back in at a good time. alot of ppl have been doing some very nice work updating the scenery and the missions and campaigns. infact in the dowloads Rami just added a Campaigne from the German perspective of the Dunkirk missions. Myself i'm working on some WWI missions and scenery addons. If you go through the last 8 pages or so in the CFS2 download section i'm sure you'll find what your looking for.
you can also visit:
http://forum.lwdesigns.com.au/many of the members from here are also there. its a CFS2 wonderland of download content. including some rare downloads not availble anywere else.
Basicly think of the theater of operation that you want and i'm sure its here or at lwdesigns.