I'm having a hard time understanding exactly what you're looking for, but for replacing objects in Unreal Tournament 2004 you obviously need to figure out how to use the mod tools that the game has.
As for creating the models, Blender is a good 3d modeler that is free. You could also get the 3ds max student edition.
As for people freaking out about copyright. Nobody will ever yell at you for making a free mod for a game.
As for creating the models, Blender is a good 3d modeler that is free. You could also get the 3ds max student edition.
As for people freaking out about copyright. Nobody will ever yell at you for making a free mod for a game.