If You Had A Twin, But Didn't Realise...
Family Life10 mins ago
No best answer has yet been selected by westisbest. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.You can boot DOS from diskette (and maybe DVD) and Windows and Linux from DVD. You can also get a bootable Windows 98 diskette.
When you install Windows XP, when you first start the install, you are in fact booting from the CD or DVD just to get you going.
There is a version of Linux that boots and runs from CD or DVD, but I cannot remember the name.
Never done it, but look here (search in goole on "booting from DVD"):
http://www.ezbsystems.com/easyboot/
http://www.free-news-release.com/Make-bootable-DVD---MagicISO-Detail_1015.html
http://www.tacktech.com/display.cfm?ttid=248