The other way around is to download preformatted CD images, and burn them out yourself. You can download installation CD images from any LinuxPPC mirror. You should download the LinuxPPC_2000_Install.image and the LinuxPPC_Software_2.image. There are some interesting readme files on the download sites on burning the files to a CD-ROM.
To make a CD, you need some CD burning software package. This is outside the scope of this document, allthough any good CD burning software should be able to do it.
Other Linux distributions have often support for direct installation via a network connection. This is not currently supported in LinuxPPC-2000.