To get any 9.0 or 9.1 python geoprocessing script to work in 9.2 it appears that you must change two standard lines within your python code.
 
#1 on the line starting with "import"
  change the windows library reference

    from   
      win32com.client
    to 
      arcgisscripting
 

#2 change this entire line 

    from   
       gp= win32com.client.Dispatch("esriGeoprocessing.GPDispatch.1")
    to
       gp= arcgisscripting.create()