Sort a Group of Numbered File Name

If you use Notepad, Wordpad, or Paint, probably you create and save a file using a numbered name like pic01.pcx, pic02.pcx, and pic03.pcx. If so, make sure that you have inserted enough leading zeros in each name. Without leading zeros, you can end up with disordered file name list, for example pic11.pcx appearing before pic2.pcx.