Yes I'm using the original ditribution from LawlessPPC.
First, it was impossible to install it on my config, but I've figured out that my DVD was corrupted (or not perfect). So I've burn it again but not at max speed, and then install worked perfectly for me (even though first time I forgot to customize installation, so it was not working !).

I've chosen to check only those options :
- Via, SB drivers
- ALC888 drivers

At first reboot, everything worked fine : sound, ethernet, drives... No "still waiting for root device" bug at all ! After that, I've installed drivers for my graphic card : I've found a complete driver set for my Geforce 9600 GT (Kext was installed thanks to Kext helper). Then I've installed some apps (iTunes, Quicktime update etc...) and my printer.

Now, I would like to update to 10.5.6 but I'm not sure it's possible ?! (I know that Apple updater shouldn't be used !).

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Config : Intel Quad-Core Q8200 - Motherboard : GA-EG43-S2H - 2 GB RAM PC2-8500 - SATA Hard drive - Nvidia 9600 GT
Distribution : 10.6 Retail