perplexing CD burning question

[G. Gunther Wallen]

I have an old Apple powerbook G3 that I want to bring to life with
Yellow Dog Linux.
I have downloaded the ISO's and have tried 3-4 different times to make
cd's the machine can boot from.
I have read someplace that k3b has issues with this.  Anyone have a
solution?

To throw a monkey wrench into the question, is it possible to
deconstruct these iso's and recreate them as one large image I can burn
to DVD?

Trying to go "all linux all the time" and I have hit a snag.