- import pictures into Adobe Bridge
- Export to Photoshop Layers: Tools>Photoshop>Load Files into Photoshop Layers
- auto align layers in Photoshop
- create a new black layer mask on your top layer (alt + click on the layer mask icon in the layer palette)
- paint in white over your subject (sometimes lowering the opacity will help you see where to paint.
- flatten image
- add shadows as needed