I got paint shop pro....
there's quite a few ways to do what you are talking about. try googling paint "shop pro replace color" you can then select areas either manually or with the wand and replace to a neutral color.
once you have isolated the front object you can use background erase to erase just the background color. then you can select the object and paste it on to whatever background you like.
that is one simple to explain way, maybe not the most efficient, but it will get you there.