A simple point-and-click solution. Load the ghost, move it to where ever you want it, rotate it so it is aligned with the camera, and hit render!
Alignment is easy with the green crosshair – rotate the ghost plane until the green X becomes a + and you’re certain it is pointing directly at the camera
Note to Poser 7 SR3 users: Due to a bug/feature, the green Origin crosshair will not show up until a character is loaded into the scene. If you want to use the green crosshair feature for easy alignment with the camera, please load all necessary ghosts before adding a character.