Q: How do I split a large file so I can burn each piece to a media (CD or DVD), and reassemble them later?
A: PKZIP/WinZIP/WinRAR/7-Zip and any of those archiving programs should be able to generate "spanning" files of appropriate sizes.

If you don't want to use compression, use HJSplit at (http://www.freebyte.com/hjsplit/)