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Installation :
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1. Copy the folder "Grand Theft Auto IV" to the place you installed GTA4 and overwrite the files.

2. you can enable or disable "depth of field" later by copying the file "visualsettings.dat" from "# 2a Add Depth of field" or "# 2b Remove Depth of field" to "Grand Theft Auto IVcommondata"
This allso works with the ultimate graphic ultimate tweak.

3. Adjust your display settings to 50% brigthness, 20% contrast and 100% saturation.

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Uinstallation :
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Copy the directories "pc" and "common" from the folder "original files" to where you installed GTA, f.ex. "Grand Theft Auto IV/" and owerwrite the files and delete the file "commandline.txt" from the GTA4 directory.