Here is a drop on that will process folders full of pov files and should
take care of folder inside folders:
Just copy and paste from here down into apple script and save as an
application:

property extension_list : {"pov", "inc", "map"}
property fileType : "TEXT"
property creatorType : "POV3"
-- This droplet processes both files or folders of files dropped onto the
applet
on open these_items
 repeat with i from 1 to the count of these_items
  set this_item to (item i of these_items)
  set the item_info to info for this_item
  if folder of the item_info is true then
   process_folder(this_item)
  else if (alias of the item_info is false and the name extension of the
item_info is in the extension_list) then
   process_item(this_item)
  end if
 end repeat
end open

-- this sub-routine processes folders
on process_folder(this_folder)
 set these_items to list folder this_folder without invisibles
 repeat with i from 1 to the count of these_items
  set this_item to alias ((this_folder as text) & (item i of these_items))
  set the item_info to info for this_item
  if folder of the item_info is true then
   process_folder(this_item)
  else if (alias of the item_info is false and the name extension of the
item_info is in the extension_list) then
   process_item(this_item)
  end if
 end repeat
end process_folder

-- this sub-routine processes files
on process_item(this_item)
 tell application "Finder"
  set the file type of file (this_item as text) to fileType
  set the creator type of file (this_item as text) to creatorType
 end tell
end process_item

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