I intend to download knoppix. But i am not sure which iso type, CD or DVD, i should download. In short what is the difference between cd and dvd knoppix releases. Second question,beacuse of bandwidth problems, I intend to download the DVD release using p2p programs, Emule or Bittorent. But how safe they are? Is the file that i am going to download using emule, same with the one that reside in Knoppix server. I dont have enough knowledge about p2p systems but my friend advised me not to download knoppix dvd file from emule servers. He told me that any user who shared the Knoppix DVD file in her computer , might have changed the iso file and could have incorporated malicious components into the iso file, so my computer would be infected. Is it possible? How can i download DVD safely from anywhere.? Thanks.