The gta3_skinedit.zip file you have requested: Tools and Utilites / GTA 3 Skin Editor - 833.25kb is not available. Perhaps try browsing all files for the game Grand Theft Auto III and upload any files you want to share or are missing. This is the only information we could locate:
Here is a useful tool that will allow you to change or create more skins for GTA 3, although this may be an older tool it still can be useful for those that would like to make more skins for GTA 3. There are litterally thousands of different possible skins that can be created using this tool with over 100 objects to choose from. Also included is a random skin generator as well as the ability to add sunglasses or glasses to the skin.