I just started using Pse11 and it seems the only way to tag people is by using the people finder , which doesn't work when you
have photos of the same person that spans 85 years. When I tried it on Pse9 it said " who is this?" about the corner if a building,
and did not recognize two people as people that were in the photo.
If I can't use Pse11 as I do Pse9 it it of no use to me.
It is possible to tag people whom PSE-Organizer can not tag automatically. Please read the following following help document which explains the method in detail http://helpx.adobe.com/elements-organizer/using/adding-people.html#id_71529