Here is code that will display an image in the lower left corner of the screen. Let me know if anything is unclear.
Code:
import viz
viz.go()
# Create texture from image file
image = viz.add('ball.jpg')
# Display image in lower left corner of screen
quad = viz.addTexQuad(parent=viz.ORTHO)
quad.alignment(viz.ALIGN_LEFT_BOTTOM)
quad.texture(image)
quad.setScale(image.getSize())