By mastering playerped.rpf , you unlock the ability to mod GTA IV freely without fear. Now go forth, replace Niko with Homer Simpson if you wish—just make sure you have that backup ready.
In March 2020, Rockstar replaced the old GTA IV with the "Complete Edition" on Steam and Rockstar Launcher. This version ( 1.2.0.43 ) removed Games for Windows Live (GFWL) but .