How to Install (all steps are required to install correctly):

1) You must have a clean copy of GTA SA version 1.0 US and have the required mods mentioned in this Readme.txt text file
   or you can see my tutorial from here:

 -> https://www.patreon.com/posts/gta-sa-tutorial-121878126 

2) Now create a folder with a name, example: "Boeing P-8 Poseidon" inside modloader folder (you have this folder in your GTA SA folder when you install the required things)

3) Open this folder:

-> 'Boeing P-8 Poseidon' 

-> Now open the 'Models (dff files)' folder and open 'Landing gear tilt' sub-folder or 'Normal' sub-folder, then open a sub-folder, open only one of these sub-folders: 'Option 1' 'Option 2' or 'Option 3', choose ONE 'at400.dff' model from ONE of these sub-folders, finally, you have to copy the 'at400.dff' model you chose to the folder called "Boeing P-8 Poseidon" (the folder you created in the second step) inside modloader folder  

-> Now open 'Textures (txd file)' folder, inside of this folder, you have to copy the 'at400.txd' file in your "Boeing P-8 Poseidon" folder (inside modloader folder)

-> Now open 'Handling lines' folder, and copy the 'B737handling.txt' file in your "Boeing P-8 Poseidon" folder (inside modloader folder)
 
4) Copy Al_Planes.cs and Al_Planes_1.1.cs files to your CLEO folder (located in your gta san andreas folder) or another folder in modloader 

If you already have these Al_Planes.cs files, you don't need to overwrite them
