That folder does
not show an
original IL-2 DVD, that much is for sure.
Parts of it are original, others are not.
It pretty much looks like a "cracked" DVD content from the Internet and could very well contain damaged and/or infected files.
The next thing you could do is download a checksum generator, e.g.
MD5summer.
In the "please select root folder" dialog, select the
parent folder of your IL-2 game folder.
Click "Create sums".
Choose your IL-2 game folder one the left side and click "Add recursively". Wait. This will take a while.
Click "OK" and let the program create the checksums. Wait. This will take a while.
At the end, you will be prompted for a filename to store the checksums to.
Save them to a file of your choice, extension will be ".md5".
Send us that file (e.g. through mediafire.com).
This is the only way to tell
which file got damaged or at least to investigate how severe the damage to your DVD is.
Best regards - Mike