Hi Hernan,
If you want some examples of working with dynamic browsers, just download two packages from ss3.gemstone.com/ss/SpaTutorial into a Moose 4.8
TutorialBrowser and XPDays2012
then open a workspace and do
XPTutorial open
Some pages will be missing because Monticello doesn't support long methods, and the exercises need the other packages and some data.
Stephan