[US_GRANT]

lol i don't know. can't find out what to do...

Real simple.
You have HSFX 4.1 with no MODS folder. CREATE one. Put it in your IL2 1946 main directory folder.
It will look like this when you are done:
C:\Program Files\Ubisoft\IL-2 Sturmovik 1946\MODS

Now place the F-86J folder in the MODS folder.
Update the AIR.INI file in the following path:
C:\Program Files\Ubisoft\IL-2 Sturmovik 1946\Files\com\maddox\il2\objects/air.ini
Load the game.
Go to Quick Mission Builder
Find and select F-86J
Fly.

You have now successfully added your first modded aircraft.

If you want to use custom skins, do this.
Create a folder in your skins folder. Name it F-86J so it looks like this:
C:\Program Files\Ubisoft\IL-2 Sturmovik 1946\PaintSchemes\Skins\F-86J

Place custom skins in that folder and you're off to the races.