ZeroPad is an Open Source (GPL) command line application, developed in Borland Delphi, that would recurse any directory specified and "zero pad" any file that starts with 0..9, but that it does not includes a 0. Like:
* 1 Una Cancion - Los De Adentro.Mp3 -> 01 Una Cancion - Los De Adentro.Mp3
It is used by just calling it from DOS like: zeropad c:\any_directory
http://mareo.netfirms.com/PS: i had to rename 553 files