Quote Originally Posted by lordmorg
Okay I just burn it as an image, but it doesn't work on the old computer. I try it with one of my other computer and it works and then I tried it using one of the school's computer.

So here my question. I burn the ISO in a cd-rw, so will a old computer's cd-rom drive be able to recognize it .
Are you certain your old computer will boot from a CD. If not, does your old computer have a floppy drive? If so, why not create a "smart boot manager" floppy (see URL below) and use it to boot the CD you create (from the ISO image file) in your CD ROM drive?
http://linux.simple.be/tools/sbm

Also, when booting using a CD in an old computer, make sure you burn the CD at as slow a speed as possible. The CD drives in old computers often have a problem reading CDs burned on a faster CD drive.