override master page items

I found this mentioned elsewhere but the solution doesn't work for me - perhaps as I'm not running numbered pages.

So is it possible to do this?

set theListOfFileNames to {"1", "2", 3", "4", "5", "5"}

set theTargetFolder to ((path to desktop folder) & "Catalogue") as string

repeat with theCurrentFileName in theListOfFileNames

  -- setting variables

          set theImportFile to theTargetFolder & ":text:" & theCurrentFileName & ".txt"

          tell application "Adobe InDesign CS3"

                         tell active document

       make page

       override (master page items) -- what to do here??

       -- then select any textbox on the page

           -- place theImportFile without showing options

       --end tell

  end tell

  save active document

          end tell

end repeat