Hi i use this version thats been kicking around for a while, can't find a link for it anymore so i've uploaded it to medifire.
Just copy the 3 directx10 files into
C:\Program Files (x86)\Steam\SteamApps\common\il-2 sturmovik cliffs of dover
http://www.mediafire.com/?knjih6uktnp8h6h
Thats it.