Hi Phil, Hagrid,
Again, as I described above you can do that with Intella now. If you choose "CSV" load file format and include images only (image format: PDF), you would basically get what you what: PDFs + CSV with custom metadata including Bates numbers. Using the field chooser you can add any metadata in the CSV including Bates numbers (RECORD_ID_START, RECORD_ID_END, NUMBER_OF_PAGES). Did you try that approach?