make bootable fedora !!!!

[boby]

Hello 
 
I have downloaded ISO images from internet, and extract each image to the separate directory.now i want to burn the first cd and make it bootable !!!! 
after burning i see that inside the first cd i have autorun file but it is not bootable.
why ? how can i make a  bootable  cd.isnt fedora images bootable?
should i do something.  
i am using  LG b's DVD recorder GOLD.
 
Thanks
Boby
 

		
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