Do you have a V4 model? They don't come with Poser.

She is a free figure (without morphs) at DAZ:

http://www.daz3d.com/i/3d-models/generation-4-bundles?cat=1025

If you have installed her, she should be under 'Figures', Poser has no folder named 'models'.

The P8 models Ryan and Alyson are under 'Figures' and you double click them to load them. If you don't understand the early steps read the manual (in the folder for Poser at Program Files) that will answer a lot of questions.