Sometimes after i've done a headshot the client might ask me to change the background. Once I've used Extract in Photoshop and after a lot of clean up, it's pretty easy from there. I have a few disks with digital backgrounds which I drop in behind the photo and do a little more clean up, a little more color balance and the photo is ready to go. I did these pretty quickly so they still look a little rough, but hopefully you'll get an idea of what you can do.