1 – Run OpenIV, Select GTA V for Windows. However be sure to locate the folder where the game have been installed. 2 – Find audio file you want to edit by going into x64 folder 3 - Then click on audio folder where you should see one folder and two files. 4 - Click on the sfx folder and then select and click on the file: RESIDENT.rpf 5 - Upon opening the RESIDENT.rpf file, you should see 16 items shown. One of them is the vehicles.awc file. 6 - Right click on vehicles.awc and export to openFormats (.oac) to any folder you like (e.g downloads folder). 6.1* If you have 7-zip or winrar, create a new .rar and rename it to something like vehicles_backup.rar. 6.2* Then copy the unmodded vehicles folder and the vehicles.oac to the .rar file (e.g vehicles_backip.rar) just in case something goes wrong regarding file/folder size of the vehicle folder/vehicle.awc file. 7 - Extract the vehicles folder from the .rar file to the same folder that was exported in. 8 – Afterwards, go to edit mode in OpenIV. There will be a warning upon editing mode so be careful. 9 - Import the .oac file by either draging the file to OpenIV or go to new and click on Import openFormats to select the .oac file then click on open. 10 - Click on ok 11 - Click on edit mode again (if you are in edit mode already) to exit edit mode. 12 - To ensure everything works, click on the vehicles.oac file twice and click on either 0x0A8960B6 or 0x0A49B203 to see if the files were successfully replaced. 13 - Exit OpenIV and play GTA V.