Hi Lawless,
can you have a look here for a problem I have w/rgds ACPI? Seems the 10.5.6 upgrade has overwritten something from the kexts used and now no shutdown/reboot/sleep is possible. Other things are alright...

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hackint0sh noobie help needed ...
LawlessPPC-Phenom-AMD now 10.5.6 working! (Voodoo Kernel 9.5.0)
DFI LanParty NF4 Ultra-D | AMD X2 4200+ (939) | 2 x 1GB OCZ DDR-500
1 x WD 200G / 2 x WD 120G (NV-RAID0) | NForceLAN 1Gbit | ATI HD3450 512MB