To get it to open a File and Maximize use:

Dim ieWin
Set ieWin = CreateObject("InternetExplorer.Application")

ieWin.Navigate "File://c:\index.html"
ieWin.Application.Visible=True

ieWin.application.FullScreen=True
msgbox("Click Ok to close.")

ieWin.Application.Visible=False
Set ieWin = Nothing

I think there's probably a much better way to do this, but it seems to work.