how hard is it to replace the floor?

[energiesource]

My floor, rocker panels, kick panels, cab mounts etc are really rusted so im assuming it would be easier to buy the whole floor piece from tri-pro and do it that way instead of buying the rocker panels and all that separate and trying to fit them in. how hard is it to remove the current floor and how would i go about doing all of it? (+ install)
thanks