Sorry about the confusion.
Hopefully this will clear things up:
I want an image of the guy walking. Nothing else, no ground, no background, not nothing
I can't find a way of doing that, so I wanted to just set the ground to a particular color so that way I can select and delete it later.
Issue I forsee by making a mesh and laying it on the ground is that it will be affected by the light, and may (I have yet to try it) hinder the selection of said color due to shadow/shading.
You mentioned scaling the ground.......
Can it be scaled to nothing?
I will play with the Alpha mask properties and see if that helps int he "removal process". Unfortunately, that will be a two step process for each image and with +200 images will take quite a bit of time.