Help....

[Tuphlandng]

I remember having problems with the 4.09m patch also
What I did was pasted the Zip file into Mu IL2 game folder /Right Click and selected "extract Here" That was the only thing I could figure out after Many attempts of extracting it to My folder.
I later learned that I didn't have to delete the folder and start over when I wanted to create a back up(I had installed a MOD Pack and wanted the other)
I started from scratch extracted 409m and my game crashed I then pasted the Zip files and Selected extract here and had no problems

Also I do recommend getting all patches from M4T

Best of luck I hope you get it figured out