In my opinion you are wrong installation procedure. Take a good cup of tea and repeat the whole procedure calmly and carefully.
Ok not being a smart ass but what is the installation procedure i dragged and dropped the VP modpack files in the zip files into my il-2 directory loaded it up went to play a mission "failed loading mission ini file berlin" or something like that.
I, my friend, am 75 yrs old, certainly not smart (never was for that matter), but by using the install instructions, precisely, for this mod pack and others similar all works fine for me. I had the habit of "paraphrasing" on my own, certain steps 'cause I thought I knew a better/shorter/quicker way. That didn't work. These guys devote much time and energy to this stuff, and realize that unfortunately there are guys like I used to be that tried to do things my way. They take great care to design these packs so that everybody can use them, not just smart folks. Read, install one step at a time, and I am betting you get it right. Says delete something? Do it. Follow the directions. Just my two cents.