I been downloading the new digitallifetv.com show and I number them 1, 2 3 ,4 and so on. When I get to ten MP sorts the files 1, 10, 2 ,3 4 when I reach 20 it will sort it 1, 10 , 2, 20, 3, 4 I don't want that I want it number right. how do I do this?