Instructions
Open your web browser and navigate to the ModTheSims website. Type "Ghost Hack" into the search bar, then press "Search."
Click the "Download" tab and download "Ghost Hack Mod" to your desktop.
Open "My Computer," then navigate to "My Documents," then "EA Games."
Click on "The Sims 2" folder, then open the "Downloads" folder. Drag the ghost mod into this folder.
Start your "Sims 2" game. Click on your character and select the "Ghost Hack" option that appears.
Click "Walking Style," then "Assign Zombie Walk." Your Sim will now walk like a zombie.