Architecture process

Hi guys,

I need your help. I started working with grasshopper since 2 weeks.

Yesterday I saw this picture:

http://alexhogrefe.squarespace.com/display/ShowImage?imageUrl=/stor...

and i love this process!

Now my questions:

How can i do that? Do i need kanguru for the forces?

maybe sombody can explain how to 'focusing on view' at Step 1 and turn on de movement?

Step 4: Splines replaced by polylines rough geometry: This step looks also very interesting, maybe someone have any idea?!

This video:

https://www.youtube.com/watch?feature=player_embedded&v=3908fVA...

is also from the same guy and process, maybe someone of you can explain what he does^^

best regards