Oh, that sounds terrible. So sorry to hear that bad news.
Usually the DBW-1916 upgrade pack by VPmedia takes me like 1 or 2 minutes to download, and I do not
have the best internet connection. I have never found it dificult to add his pack
because he just puts it all neatly into one folder-pack and to overwrite everything else already installed.
I also install my airplanes by hand before when I test fly them to paint the new skins, but once I install his
pack I go back and delete all the previous airplanes and their line entries in the ini configurations. Many times I also
have to go into his pack and re-install my own personal skins and textures into them which I like to see for my own game.
So far I have not had any problems.
Perhaps you are having some mod or something that is making these troubles with your game. Even that simple "moon mod"
was not working in your game
I which you could see it.
I hope you can resolve this.