How do I list all files recursively,sorted,without PATH on command line ?

I want to list all files in a whole directory tree.
They should be sorted by their filenames EXCLUDING (!) the path.

If I type e.g.

dir /A /S /B

all files are listed but they are sorted including the prepended path
part.

How can I omit/suppress the path and list only the files (and sort them) ?

I consider a DOS command (under Win2000/WinXP) or alternatively
an external utility is acceptable as well as long as it works at the
command prompt.

Claudia