[SpiraMirabilis]

I wouldn't recommend it. When you go to an interview and they see you have a FE rating at first their eyes will brighten up and they'll ask you: 'Oh, where were you a flight engineer for?' and when you say 'Well, I went to simuflite and paid five grand for simulator time so I could do my checkride.' they'll get this disappointed look in their face and say 'Oh. I see.'

But basically, so long as you have those requirements met you can do the checkride in a regular simulator or an approved flight engineer FTD, which I don't think there are many of these days but who knows.