If you have a STEAM version, just extract the contents into your IL2 folder over-writing when prompted. Once the beta patch is approved it will be released via STEAM at which point your can 'verify installation integrity' to remove beta files.
MegaUpload link for ENG version:
:: http://www.megaupload.com/?d=MA26GNU1 (500mb)
The main changes are:
:: New sound engine (the release version of IL2 CLoD had a sabotaged sound engine)
:: New colour scheme (scenery colours and view distance haze are more realistic)
:: New MP maps
:: New plane (BF109 E4)
:: Some bomber improvements
:: Although not in the patch notes, the spitfire flight model appears to have been improved.
Useful Info upon Patching:
Clear your cache and defrag the game folder:
After applying the patch go to: documents\1c softclub\il-2 sturmovik cliffs of dover\cache
You'll see a bunch of file in there and another folder named "shaders". Go into shaders and delete all files in there, but don't delete the folder too. Now go back one level back to the cache folder. Delete all files in there too (remember, except the shaders folder).
Open steam, right click on CoD's icon, select properties and click on the "local files" tab. Now click on "defragment cache files" (this is not the same cache we just deleted in the documents folder, it's steam's way of referring to your actual game folder).
What does all this do?
The steam defrag does just that, it defragments the game files so that they are in continuous or adjacent blocks (or both), making it easier (and faster) for your hard disk to read them without having to look all over the place.