NTPASSWD is free. No charge, and free to use.
by R. Proffitt - 8/2/10 7:48 AM
All the above points to the usual incorrect method of creating the CD from the ISO. I've lost track how many times folk create a bootable CD and place the .ISO on the CD.
Try creating a CD from the .ISO and it should boot. Resetting a password with NTPASSWD is simple with answering one question and yes to the next ones. This is why I don't write how to use it.