megaprime13 wrote:i have OSX?
Ok, its slightly different. Go to your applications folder, right click on ysflight and select show package contents. At the same time, have the pack open in another window. In the pack, the folder structure is something like this "zip folder>HGPGAC_20140401(or something similar)>then two folders - aircraft and user"
Open the aircraft folder in both windows, and copy the .lst file from the zip file to your ysflight>aircraft folder (if this is done and the user bit is incorrect, you will know because when you open ysflight, you will get millions of error messages)
Go back one in each window. In the ysflight folder window you should have around 11 or 12 folders, and about 5 files. In the zip folder, you should have those two folders, aircraft and user. Now, right click on the user folder and select copy. Paste it into the ysflight folder window.
That should work. If you have keep having a problem, I suggest a reinstall of ysflight. Have you installed mods before?
Hope it works!