subsurf for head modeling problem

I am hoping someone could help me on this one please. i am busy doing the tutorial on “using subsurf for head modeling” and i am stuck on step nine.firstly how does one place the cursor over a particular vertex and secondly how does one set a new origin for any object.i am totally lost on this one.

here is a direct link to step 9:


To move the cursor over a particular vertex, go into edit mode, select the vertex (right click), then press Shift-S and choose cursor to selection.

The second question, setting a new origin, in the Edit Buttons (F9) you will see three buttons “Centre”,“Centre New” and “Centre Cursor” I would suggest that you put the cursor where you want the centre point, then TAB to exit edit mode then press “Centre Cursor”

Hope this helps