This is my preferred way of installing files but you use any method that you like. I use Windows Explorer.
1) Make a folder called "Temp" or "Crud" or anything you like in the root directory of Windows Explorer.
2) Unzip all the files and folders from the downloaded "skybyfsx.zip" file to the folder you just made (for example "Temp").
3) Select the folder called "Interplane Skyboy" and hit "ctrl-c" to copy the entire folder and its contents.
4) Go to the "c:\Program Files\Microsoft Games\Microsoft Flight Simulator X\SimObjects\airplanes" folder of your FSX flight simulator and paste (ctrl-v) the copied "Interplane Skyboy" folder there.
5) Be sure to read the "READ_ME.txt" file in the "Temp" folder. That is it. If you wish you can delete your "Temp" folder now but I would save the downloaded "skybyfsx.zip" file somewhere just in case of emergencies.
