Customization & which package to purchase?

[Nod]

thank you so much, Marco, for the link. Does that documentation also apply to the forum, or is it mostly about the CMS?

I was under the impression that plugins where all about the CMS...

I've been scoping out a strategy my idea's design, and one thing I will need to do is slip my own CSS class names into the DIVs that contain each post/reply. Is it easy to discern where in the code I will need to make these types of changes?

How detailed is the documentation about the DB structures for the forum? (I'm not sure where to start looking in the link you posted...)