[gh0sth@cker]

No, dummy files is an oldish copy protection. When copying from cd to hard drive, these dummy files usually appear very big, making the disk over 1Gb in most cases. This stops people copying from cd to hard drive to cd - the technique that was used a lot years ago before copy protection.
But Clone CD will be able to copy the disk fine with the dummy files. The cd may be scratched however, leading to the slowdown in the reading. You could try cleaning it using the "toothpaste method" or you can take a chance and put Fast Error Skip to 'On' rather than 'Automatic'. This will skip all the errors it encounters, but as u would expect, this may lead to a corrupt copy.