NSIS file drag and dropper thing tool
note, I started writing this as soon as I got in from school, so I didn't see Chris12345's post which sounds as though he has made a program that also generates File statements..
Well anyway, what this does is display an system modal dialog that contains a list box. You can drag 'n' drop files in the list box and then click a button for 'File "file.dat"' statements for each of the files (or directories) to be copied to the clipboard.