GTA5 FPS booster for low end computers (shows what this script does)
https://www.youtube.com/watch?v=BZWhRi45VnQ
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How to edit the GTA 5 FPS booster for non steam (shows how to edit the script for non-steam copy of the game)
https://www.youtube.com/watch?v=4M3P3T7QPKY
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Both links are all so can be found on the page where this was downloaded from
https://www.gta5-mods.com/tools/gta-5-fps-booster