This is a tutorial I made to highlight how you install 10.5 Leopard on a machine with a CPU slower than 867MHz and Unsupported Graphics card.
Sources:
Open Firmware stuff:
https://lowendmac.com/2007/fooling-th...
Unsupported Graphics:
https://forums.macrumors.com/threads/...
Driver Installer if you want to know where I got the commands to repair permissions:
https://forums.macrumors.com/threads/...
2D dock:
https://osxdaily.com/2007/12/24/chang...