[bruinfelix]

3. Is it possible to use WordPress blog’s header on bbPress (Replacing forum header with blog’s header) without integration?

Yes, it is possible. I did it for my own website, and i dont experience any kind of performance problems (yet).

4. Page Views is not appearing in the forum menu. How to fix that?

There’s a plugin for that …

And for the rest i must say. Use the search button more often, there’s a whole world of answers on youre questions, just throwup a searchphrase, and you will be amazed what you could find