How to make the Bootable DVD or CD
Unzipped, there should be an ISO image file (cd??????.iso). This can be burned to CD using whatever burner program you like, most support writing ISO-images. Often double-clikcing on it in explorer will pop up the program offering to write the image to CD. Once written the CD should only contain some files like "initrd.gz", "vmlinuz" and some others. If it contains the image file "cd??????.iso" you didn't burn the image but instead added the file to a CD. I cannot help with this, please consult you CD-software manual or friends.
The CD will boot with most BIOSes, see your manual on how to set it to boot from CD. Some will auto-boot when a CD is in the drive, some others will show a boot-menu when you press ESC or F10/F12 when it probes the disks, some may need to have the boot order adjusted in setup.