You can try the port of knoppix-MiB for PPC here (alpha release):

ftp://ftp.crihan.fr/mirrors/knoppix-mib.org/

Read carefully the README-PPC.txt

The knoppix-Mib is presented here:
https://www.bouissou.net/knoppix-mib...oppix-Mib.html

there is screenshots here:
http://fynl.free.fr/K-MiB-PPC/

it runs on some powermac, ibook, imac CRT. No tests on powerbooks yet. No success on Imac TFT or eMac yet

for NewWorld machine.

kernel-2.4.21-ben1
QTParted/parted with hfs/hfs+ resize
swapfile on hfs/hfs+ partition
OpenOffice.org 1.0.3
XF 4.3
encrypted swap (AES 12
encrypted persistent home (AES 12
autodetection of the usb persistent home

this a test release.