If not Ford's image, why not Arnold's as his last programming effort prior to his death? He seems to be doing things Arnold used to do, with Ford even giving him a warning this past episode. Maybe Arnold put in the dead child backstory so Ford would trust him w/ them having something to have in common. Thing of it as Arnold's last effort to "prove to Ford" that he was correct. Ford's image seems to make more sense, but Arnold's is certainly not implausible.