Maybe you downloaded some other OS and need to burn that but your Knoppix is in the drive.
FIX! Create a bootable USB instead. 8GB USB sticks are now seen at checkout counters for a few dollars.
Second FIX! Use the TO RAM feature. Here's the Knoppix note on that. https://www.google.com/#q=knoppix+to+ram
Are there any operating systems that i can just copy its data without going through the install procedure to the hard drive and succesfully boot ? Because iam using knoppix 5.1.0 right now and i got rid of my xp fullfiled with viruses and i want to install Syllable os but i remind myself that i have an install cd of it but i cant find it anywhere and i only have one dvd-cd drive hence knoppix should be inside the drive at all times and i want to burn another cd of syllable os but i just dont know how and if there are any oses with that kind of idea as i mentioned, then please recommend me some