Before you do anything, please make sure to visit my GitHub repository: Satisfactory Pak Installer
IMPORTANT REMINDER: YOU NEED TO HAVE YOUR 'developmentMode' SET TO TRUE IN 'SML.cfg'.
Now that you've installed it, hopefully, you just have to search for a mod online that only contains the .pak and .sig files.
If you can't find any, just go to my mod repository project.
Now that you've installed my Satisfactory Pak Installer, hopefully, we can download my BetterParts as a test, and hopefully for you to keep.
All you need to do is open the Satisfactory Pak Installer and find your Satisfactory game installation.
Once you've done that just navigate to where you've downloaded my mod and click 'Ok' in the browser dialog.
Now just click 'Install Content' and launch your game once the progress bar is finished and empty.