The editor will get you going on the traffic lights. Skins - Photoshop, Gimp, paint.net, MS paint, basicly anything that can edit photos. !!!: Layers are an important thing for better mapping, photoshop or paint.net is recommended! Models - Zanoza Modeler (ZModeler), 3DS Max, Cinema 4D, basicly anything that can be used in 3D arts. Scripts - Wordpad, Notepad, mostly anything that can edit texts. !!!: C++ Knowledge are required! Mostly anything else can be done in the editor. Just a matter of playing around with it.