i am trying to display the remotecontrol.png texture to display.
Create a new material using the png you have, apply it to the geometry then select everything and use the SketchUV extension, with the geometry selected, select the UV tool, right click on the geometry and select box map. It’s a wii control so I’m guessing you have something similar to a box. If that doesn’t work, could you share the file so we can check what are you working with?
Images have to be IMPORTED and applied to an existing face in a model. IMPORT is under the file menu. Click it, you’ll have to navigate to your image file. Click on the image file to import it into SU
Place the image starting on the bottom left of the face in your model and drag up and across. Let the mouse button go to accept the placement.