Im stuck just after the fake fire place I opened it up went through and it leads me back to the dining room area,,, looks like I need to find a way to open a door but dunno what, spent almost an hour looking around,,, would appreciate it if someone can help, thanks!
To open a main door you need to do a light-switch puzzle in the room with the giggling man. When I finally found the fireplace, it all flowed for me - I can't remember exactly where I went next, though ...