I've used the iDeneb.Combo.Upgrade.KIT.1057.dmg to upgrade to 10.5.7 and it went perfectly fine. This Ideneb Combo brings the Ideneb 10.5.7 update package, iDeneb.Tool.rev1, and the "Disabled extensions" directory. For some of you, there will be probably a need to copy the "Disabled Extensions" back to the Kernel extensions directory. My personal setup does not require any further changes besides the 10.5.7 combo pkg. I do advise to read the instructions inside before any installation attempt.

Reminder regarding my setup: Intel Q6600 2.4Ghz oc@ 3.4Ghz, Abit IP35-E, 4Gb OCZ 1066Mhz 150Gb WD Raptor10k, Sata DVDRW, ATI HD3870 PCI-E.