[GTA V] How to decompile R* scripts

Use this program: https://github.com/zorg93/GTA-V-Script-Decompiler
Find the script(s) you want to decompile within this archive: Grand Theft Auto V\update\update.rpf\x64\levels\gta5\script\script_rel.rpf

Export the script you want to decompile by right-clicking it and then clicking "Save Content/Export" (NOT "Extract").
Then run the decompiler against the #SCRIPTNAME#.ysc.full file.

You may not be able to decompile some scripts, such as the carmod scripts (as of 1103 these are carmod_shop.ysc, hangar_carmod.ysc, and personal_carmod_shop.ysc).