XML Flash Gallery, Displaying Current Position and the Total Number of Pictures

Hi, I do have a question regarding the numbering system in the XML Gallery. I would like to ask you on how can I modify the AS so when the gallery shows how many images are there total it shows in order like 1/50 (when the 1st image on top of the list in xml is showed first) is it possible to reverse the counting of the images that the first image on the bottom of the XML list will be marked as #1 and the top picture would be always the largest number ? no matter what number of images I apply to the list ? I do have a trouble in orientation if I add new pictures to the list, so every picture gets a new number, and I cannot remember what image it was, but I do need to have the newest pictures as the first showing from the gallery and then descending to the oldest one