Let me be the first to say (out loud) : good choice! MacPup (or any fork of Puppy) is by far the best
you can run on that machine, it runs nicely on one of mine
Okay, on booting up from the CD, you'll be presented a graphical (brown tinted) screen - hit enter. But...since you did that, and this
Error 25: disk read error
...came back, I'd bet on a dead CD rom. Try to burn it again.
By the way, did you checksum
the download before burning the disk? If there's something bad in the ISO (possible, this IS the Internet, anything's possible) that could save a disk and some time and a lot of frustration...
The sum on site
right now is
The on-disk install of MacPup has a quirk, so, if you'd want to install it, I'd gladly give whatever advice you need!