Google Voice: how to change speed dials?

On the left-hand side of the Google Voice user interface, next to "Contacts", there is a + (plus) sign, and when you click it, it maximizes into a list of 5 people. I did not choose any of the people on the list, how can I change them? Thanks!

From web app studiohack

• As far as i know, you cannot change them. See here.

  studiohack : oh brother. thanks!
  From David A.