The dummy files are often (but not always) combined with some other protection. The trouble may occur when you try to remaster your copy, i.e adding a NoCD/crack and copy the files to harddrive.
You may end up with files over 2 GB which may be hard to fit on a 80 min CD....of course, this can be "dealt with" and the trick is pretty lame, but it can be annoying.
