В самом распаковщике есть, но там ничего особенного, просто путь:
The Redux campaign is supplied as a self installing REDUX.EXE file which will place all the necessary files in your Cliffs of Dover campaign directory.

The only action needed on your part is to follow the instructions in the EXE interface. Most important is the next screen where you should tell the installer where you have installed the campaign files, as this may be different from user to user. Usually however it is:

C:\Program Files (x86)\Steam\SteamApps\common\il-2 sturmovik cliffs of dover\parts\bob\mission\campaign\

If you don’t choose a folder at this point, or you prefer to manually install, then by doing nothing, the campaign_gb folder with all the needed files will be placed in your My Documents folder. You can then copy and paste it to the directory above (more details in the readme.)

You can always uninstall the campaign by going into Steam options and getting Steam to validate your Cliffs of Dover install. This will return you to the default RAF campaign.