Please note - If you wish to use the Campaign Pack textures for slots 4, 5 and 6, it is *highly* recommended to also install one of the pak files for either the JASDF or No Markings variants into slot 1.
ie, to install as a collection :
F-15J JASDF Green Aggr Skin 1_P.pak, F-15J Green Aggr Mage Skin 4_P.pak, F-15J Green Aggr Spare Skin 5_P.pak, F-15J Green Aggr Strider Skin 6_P.pak
or
F-15J Green Aggr Skin 1_P.pak, F-15J Green Aggr Mage Skin 4_P.pak, F-15J Green Aggr Spare Skin 5_P.pak, F-15J Green Aggr Strider Skin 6_P.pak

This is in order to maximise MREC Accuracy, as Mage, Spare and Strider all use the same MREC texture as Osea (slot 1).
If you replace just textures 4, 5, 6, without also replacing texture 1, you may see minor visual errors on those aircraft.
Likewise, if you decide to replace just texture 1, whatever skins you have installed into slots 4, 5, 6 may subsequently show minor errors.

Hopefully in the future, when the process of using instance files to allow ALL texture slots to use a unqiue MREC, becomes more automated, this archive can be updated in a far more streamlined manner.
For now, my compromise to offer you more flexibilty in what you want to use, or not, is to provide a large variety of pak files.

All of these pak files use the "_P" suffix as a precaution. Although it is not currently required for this to be part of the file name as of September 2019, if Project Aces update the base F-15J external textures in a future DLC or update, the "_P" will become required.
Future proofing!

This archive contains 15 pak files:

• 3 .pak files that will install a full JASDF set of markings, including 92-8908 number, for Texture slots 1, 2 or 3.
• 3 .pak files that will install a completely clean version, primarily for multiplayer and using the in-game emblem customisation, for Texture slots 1, 2 or 3.
• 3 .pak files that will replace the Mage, Spare or Strider textures with campaign friendly versions with the correct Osean markings in their respective slots of 4, 5, or 6 (it is recommended to use these in conjunction with either a JASDF or Clean version .pak file in slot 1).
• 6 .pak files that will allow the Mage, Spare or Strider textures to be installed seperately into texture slots 2 or 3, and so able to use the custom MREC without replacing either slot 1 or the default Mage, Spare or Strider textures in slots 4, 5 or 6.
  
  

Installation:

• Navigate to the Ace Combat 7 installation directory and go to Game\Content\Paks\~mods
  (If the "~mods" folder does not exist, create it.)
• Paste the desired .pak file(s) into the "~mods" folder.
• Launch the game and select the skin that the installed .pak has replaced.
  If you are unsure where Ace Combat 7 is installed:
• Go into your Steam library and Right Click on Ace Combat 7: Skies Unknown
• Select Properties
• In the window that should pop up within Steam, click the "Local Files" tab at the top
• Click the "Browse Local Files" button