I'll advise you to buy the box/cd version (1946 with the Russian jet on the front cover) if possible and download(and save) the TeamD updates. You'll save yourself a lot of future problems.
You'll most probably find the box in the 'bargain bin' in media stores... nice and cheap.
Never tried WOP, and have no intention of ever doing so. IL2 (Oleg's) is quiet simply, still streaks ahead of anything else.