Modding Installation
The "Grand Theft Auto IV" software does not let you install new cars or vehicles without a modding software first installed. Download and install the "GTA IV Magic Modder," "GTA4-Launcher" or the "GTA IV Modding Unlocker." Follow the onscreen directions and everything will be installed automatically.
Pocket Bike Skins
Download the "Grand Theft Auto IV" vehicle mods for the pocket bikes. GTA Gaming hosts a pocket bike double pack that includes the Mini PCJ and the Mini NRG900 pocket bikes. Download the ZIP file and extract the TXT files to a place you can remember.
File Transfer
Go to your computer's hard drive and double-click on it to load it. Click on "Program Files," "Rockstar Games" and load "Grand Theft Auto IV." Double-click on the "Common" folder and then the "Data" folder. Drag and drop the newly saved pocket bike files into this folder. Click "Yes" that you want to replace the file. Exit out of the Explorer windows.
Game Play
Load the "Grand Theft Auto IV" game. Drive or run around the city to look for the pocket bikes. Look for the original locations of the full-sized dirt bikes to see the new modified versions. In most cases, you will find them among traffic or near water areas.