Google Analytics Segmentation

I've enabled the google segmentation (basic), and today I've seen it works with no problems, I see segmentation at "members" and "guests" but I also see a significant number of visits defined as "not set".

I imagine this comes from my photopost installation, because those are the only pages vbseo doesn't run in my vbulletin installation, is that correct? So I still have the analytics code inserted in my photopost pages manually.

Is there any way to get segmentation there too?

The segment is session based. So long as that user visits 1 page that is segmented during their visit, they should be classified properly for their whole session.

It's not perfect. I still have the majority of my visits logged as not set.

Ok Brian thanks for the reply.