You can't save AFTER he's left the game, because he won't save too, and so won't have the save file. You need to restart from the last autosave that he does have.
Wont manualy give him the file work? (even tho i guess it's not the recommended approach
). Vista was hidding em from me, already found where they are. I'll use the autosave if there is no other solution then.