Hi track, the function AddImage() in commands\Image.js is how MoI's image command creates new images. But it's a little complicated since all the UI and pointpicker bindings and such are in there as well.

Here's a streamlined example that just uses some fixed parameters:

    var filename = 'c:\\img\\test.jpg';
    var baseframe = moi.vectorMath.createTopFrame();
    var cornerpt = moi.vectorMath.createPoint(20,20,0);

    var factory = moi.command.createFactory( 'backgroundimage' );

    // background image factory has 3 inputs:
    // 0 : String - FileName
    // 1 : CoordinateFrame - Plane that gives orientation of bottom-left corner of image
    // 2 : Point - upper-right corner point.

    factory.setInput( 0, filename );
    factory.setInput( 1, baseframe );
    factory.setInput( 2, cornerpt );

    factory.commit();

Hope that helps!

- Michael