Not like that it's not. You could access the File, Open menu but from there
you would be working with the menu itself, which can't be controlled. To do
exactly what you want would require creating a form (UserForm in Outlook
VBA) with the list of folders you want to open and then when a selection was
made using the NameSpace.GetSharedDefaultFolder method with the selection as
an Outlook Recipient item to open the folder.

It would be pretty easy to do actually.  Just go through
the exact process of opening the folder without using
your mouse, only keyboard commands.  During the process,
record every keystroke you make, and once you have it all
written down write a VBScript and use the "sendkeys"
command to send the keystrokes.  Remember to sleep the
program a little if some things take a little while to
load after the previous keystroke (ie: a window takes 3
seconds to pop up, used wscript.sleep 3000)

Tim