Is there a method of renaming all the files in a folder systematically? I
have a folder full of files that begin with numbers. I want to add a 0 to
the beginning of each filename (i.e. 1.xls will become 01.xls). I have
tried putting the command 'rename *.* 0*.*' into command, but that replaced
the first letter of each filename with a 0, rather than adding a 0.

This there an easy way to do this?

Thanks.