Why not just save the poser render as a .png file? That way you don't have a background and don't have to worry about dragging it or deleting it or having to access an alpha channel to get rid of the background.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi