• Blender 2.8-3.0 program
  
• Better FBX Importer & Exporter
  
• Link: Add-on link[drive.google.com] (copy the link into google)
  
• The game

• download the add-on. You will get a zip file, do not unzip it!
  
• Go to Blender’s user preferences. It’s in the edit menu.
  
• Open the Add-ons tab
  
• click Install at the top right
  
• navigate to the downloaded zip file and select it
  
• the add-on is then installed
  
• check the box next to its name to enable it

1. Import the model you want to replace using the add-on
   
2. Import your model
   
3. copy the length of the base of the model you want to replace and do this formula: x/0.0254
   
4. apply the scale
   
5. change the scale to 0.0254
   
6. insert keyframes for the scale
   
7. change the rotation mode to quaternion
   
8. insert keyframes for the rotation
   
9. copy the transformation of the model you want to replace and paste it in your model
   
10. insert keyframes for the transformation
    
11. add the materials of the model you want to replace to your model
    
12. remove the model you want to replace
    
13. export the models using the add-on provided to your source folder in your mod folder using these settings:

If you have any questions, here’s my discord: NaviTato#3864 or just add a comment

if you want to help develop this method (adding materials is quite hard and i haven't done it yet) then send me a discord DM.