Update-
I managed to get this package to work. It seems that the installer components only unpack properly with Winzip. I normally use the standard Windows unzip program or 7-Zip & sometimes WinAce to unzip different folders or installers but none of those would unpack the files without corrupting the installer. It's kind of a quirky setup with the 3 part files and the z01 file dependency for the main installer file.
As far as how the scenery is, on my aged system there's a bit of a FPS hit which is likely due to some of the high detail aircraft objects in various spots on the field. On higher end systems, this will likely make no difference. The only other issue is that the photoreal scenery is set up for spring/summer and not winter. The size of the photoreal area is quite large and stands out in the surrounding white winter snow of Russia as a large block of snowless ground. If you set the time & season for spring/summer, it's no issue.
Other than that, it's a masterpiece of freeware!