I did some portraits yesterday and when I started to edit them, I thought they'd look better if I had done them on a white background....unfortunately they are out of town-ers so I won't have the chance to re-do them....does anyone know of an easy way to make the background white in photoshop? I am awful in PS and would love some tips. The background on the originals is just your typical outdoor shots....lots of green and a a house or two in some. Is this even possible? Or should I just re-shoot them?