Someone asked me to convert some 'ordinary' mp3 files to ISO 9660 format, level 1 or 2 for use on a Tascam recorder (cd-rw900sl). Found the ISO option but not the mentioned 'levels'. My OS is Win7. I haven't used Imgburn before. Which steps should I follow to reach the proper result (or where can a rookie find a description)? Tnx in advance.