I've discovered that I also need to fix files missing DOT, RTF, TXT, HTM, JPEG, JPG, DOCX, DOCM, XLS, XLSX, XLSM, PPT and PPTX extensions. I'm struggling to see how I can how I can create functions to test for those from the info provided at http://www.garykessler.net/library/file_sigs.html. Is...