I've already downloaded Debian 5.06 for the PowerPC(I was told it would do well), but cannot figure out how to install it. No floppy, and the CDs themselves do not boot
The first problem is you need to boot from something to install it.
How did you burn the CD? What format was the image? Can you give me a link to the d/l site?
Unless you're doing an internet install, it will be 8 CD's or one DVD.
If it was an ISO you should use Disk Utility to burn it.
Maybe this will help?