DOS command to copy only files and not folders in a folder tree : Let's assume the following folder structure,

c:\tab\file1.txt
c:\tab\insidetab1\file2.txt
c:\tab\insidetab2\file3.txt
c:\tab\insidetab3\insidetab4\file4.txt

I want to copy only files file1.txt,file2.txt,file3.txt,file4.txt to some destination. Basically i want to remove all folders and keep only files is my requirment. Is it even possible ?