GOEPAK SITE MODELER

Hello,

I am just beginning to learn Power Geopak V8i SS2.

I have some confusion about the Site Modeler and how things are being defined: 

1. Do I have to have a Project?
2. Does a model have to be in a Project? 
3. Can I assume an Object is a component of a model, so adding/building Objects can ultimately build a model?
4. How about Elements, what are they to a model?
5. Does a model have to be part of the Site Model?

Any clarification is appreciated.