How to Get the Zombie Mod in GTA 4 for PS3by Derek M. Kwait ; Updated September 22, 2017
The advent of next generation systems has taken the virtual reality of video games to a new level by allowing techno-savvy gamers to not just be in a virtual world but to modify it in ways that can completely change its mood. The Zombie Apocalypse Mod for Rockstar Games' "Grand Theft Auto IV" is an example: Thanks to user jc0001, you are now not just a virtual criminal, but also a heroic fighter of the living dead.
Go to GTAGarage.com (see References for link). If you have an account, log in; if not, it is a good idea create one, though not absolutely necessary.
Click "Major Modifications."
Browse the list until you see "GTA 4 Zombie Apocalypse." Click that link.
Click "Download Mod" on the right-hand side of the screen under the screen shots in the "Files" box. It will open a list of files.
Download the most recent file as this will be the most complete. Once you click the file, a dialog box will open confirming that you want to download it.
If you have a GTAGarage Account, find the mod faster by searching "Zombie Apocalypse" in the search box in the top right corner of the screen.