Re: no boot from cd
I hope you didn't pay a lot for the CD. For one, Ubuntu is free. For another, Ubuntu 13.04 doesn't fit on a CD, unless it's the minimal install (with no graphical environment installed by default). Moreover, 13.04 is non-LTS, no longer the latest release, and will only be supported until January. (You should really be using 12.04 LTS or 13.10.)
I second Morgaes' comment. If that is indeed your machine, you should be running something lighter like Lubuntu.
Jane, stop this crazy thing!