When you go to the pause menu, the GTA4 original pause menu theme will play.
(I took the original sound file straight from the PC version of GTA4)
REQUIRED:
1. OpenIV
2. WinRAR or 7Zip
INSTALLATION:
1. Extract the content of the ZIP file in a folder anywhere in your PC (REQUIRED OR OPENIV WON’T FIND THE AUDIO FILES)
2. Open OpenIV
3. Navigate to: mods\x64\audio\sfx\STREAMS.rpf\
4. Turn on Edit Mode.
5. Drag ONLY the .oac file and don’t touch the folder.
6. Start the game.
Credits:
LePtitKiller