21 PLANAR material mapping
If you want to project an image on a mesh without having to mess with the UVS, create a new material. In the diffuse channel (or any other) import a texture. Select File from the Texture Creator, right-click and pick Create as Projection. Now, you can project your image without messing up the UVS. Once placed, delete history or you can bake your texture into the current UVS.