This mod will enable tommy to wear a short sleeve T-shirt and Jeans. The T-shirt is customizable, and you can change the texture of the jeans to your liking. This mod is a conversion of the Kung Fu outfit from the story. I have just modified it a bit so he doesn't have the headband or logo on his shirt.
To install, just simply replace the player.dff inside the GTA3.img with the one in here, then replace the player.bmp in the generic folder, thats in the same directory as the GTA3.img.