I have installed Zephiroth 10.5.2 yesterday evening, all went well just OOTB, except for some little issue:

- I had to replace graphics kext with the ones I backed up from 10.5.1 because of some graphics artifacts on 8800GT 512MB, now System Profiler reports 771MB video RAM as in 10.5.1 but everything works very well now. The only edit I made in that kexts was adding the values for 512MB in NVinject.kext manually (it is the 0.2.1 version of NVinject)

- System Profiler reports only one core (like I am using cpus=1 flag at boot), but the system seems more responsive, like when I was using two cores without LAN on 10.5.1... need to investigate more on this...

- I also migrated my settings and apps from the previus install because now I have installed on my SATA drive without deleting the old installation on my PATA

My specs:
OS X: Leopard 10.5.2 R1 by Zephyroth
Board: ASUS A8N SLI
Memory: 2GB Kingston HyperX (4x512)
CPU: AMD Athlon 64 X2 4200+
Graphic: GeForce 8800 GT 512 (now working with NVInject 0.2.1/10.5.2 kext also QE/CI)
Integrated Audio: Realtek ALC850
HD1: WDC WD800BB-00CAA1, 80 GB with older 10.5.1
HD2: SATA, 125 GB with new 10.5.2
HD3: SATA, 125 GB
HD3: External Firewire, 250 GB

My install options:
Kernel 9.2.0, EFI, MBR, Forcedeth.kext, NVidia+NVinject, AC97 Audio