Once the base game is installed, additional DLC (like the Beach Bum or Heists packs) follows the same logic.

Copy the four data files (typically named 545408A700000001 through ...04 ) into the corresponding path on your Xbox 360 HDD.

💡 Use a FAT32 formatted USB drive to transfer these files if you are not using FTP.

GTA V requires approximately 8GB of mandatory data (from Disc 1) to run. On a JTAG/RGH, you cannot simply "install" this disc from the dashboard.