Burn bootable dvd

I am having OS in my computer but not as a image file. Its size is geater than 2GB. I want to write that OS as bootable format in DVD. Please help…

[QUOTE=elango.V;2296920]I am having OS in my computer but not as a image file. Its size is geater than 2GB. I want to write that OS as bootable format in DVD. Please help…[/QUOTE]
Use Imgburn , its free and it will write a bootable .iso