so far I've tried
-- open "C:\Program Files\Microsoft Office\Office10" with "explorer.exe"
--open (QUOTE & C:\Documents and Settings & QUOTE) with "explorer.exe"
--open ("C:\Documents and Settings") with "explorer.exe"
--open " & C:\Documents and Settings & " with "explorer.exe"
--open "C:\Documents and Settings" with "explorer.exe"
--open "C:\Documents and Settings"
--window("C:\Documents and Settings").open("explorer.exe")
--window("C:\Documents and Settings").open()
--window("C:\Documents and Settings") with "explorer.exe"
--open "Explorer /root,\\Documents and Settings"
--open "Explorer /root,\\Documents and Settings" with "explorer.exe"
-- ("C:\Documents and Settings").open = "explorer"

and not got anywhere :-(