ISO CD Burn :To boot or not to boot?

Hello….
I have a ? for you. I downloaded under my new enterprise account a copy of MS 2003 Server SP@ X86 ISO and then burned a copy CD to boot up with.
The problem is : The boot CD will not boot my target server I setting up.
How can I boot up this TARGET ISO just created?
Do you have instructions if I proceed booting off another O/S platform?
In my case I have a working 2008 R2 server platform that I want to replace withe 2003 version non-license (evaluation copy).
If I view the CD content you see the Auto and/program files listed -Ready to go you would think..Why can’t I boot off the CD a start a fresh install.
you know If did something wrong in the burn process (Using InfrareRcorder)
Pls Advise