How to create a bootable CD

["A.Belahcene" <belahcene@iap-cu.dz>]

Hi every body,
I have the knoppix CD, NOT an  iso format,  I want to create an iso 
BOOTABLE  from the expanded directory. How to do it please.  
The original CD is bootable this is the content of the CD:
KNOPPIX (directory) ,autorun.bat,  autorun.inf, autorun.pif, boot 
(directory), cdrom.ico ,index.html

thanks for help
bela