You asked for a method to place a single image in a model.
1: place desired image in Library by making a new folder in the library called PICTURES.
2: Reload library.
3: Locate "Picture 10" object using Object dialog box and searching to find it: Path might be: Object Library>Pictures and Texts> Picture 10
4: Place object.
5: Open object dialog.
Set Custom picture name to your picture's file name.
Picture will represent in rendering.
Dwight Atkinson