It's a stand-alone sim; has absolutely nothing to do with CFS3.
Shockwave was their original domain name.
If you try to go to the website found on your disks, I don't think it will work; use the url I gave you to get into the forums.
BOB II has three forums as subsets of all their forums.
I can recommend the sim to you. It has a lot of good stuff in it, and like ETO, MAW, and PTO, has a good following of folks who like it. It is, however, dedicated to the Battle of Britain and has nothing to do with the war which followed.