Probably a bit late to reply but just been playing with this machine now.
Install OK with Leo4All 4.1 (10.5.4), network connection worked ootb, display resolution is native 1024x768 without kext loaded, quartz GL supported.
Issues: not able to boot wihout DVD and no audio.

fix for audio:
deleted all audio kexts
modified AppleAC97Audio kext
installed modified kext

fix for boot
followed this link to fix boot error:
http://www.insanelymac.com/forum/ind...howtopic=78235

disabled all ACPI kexts
installed the ones in file attached in the link
disabled the AppleEFIRuntime.kext.

Repair disk permissions
Reboot

Both pmbs solved at boot!!