Well here's my personal Experience with 10.5.2

1st I can't believe i wasted 1 day of my life trying to get it done, but finally did
2nd Weird but, nvinject.kext its preventing the desktop to load With or Without LeoGraphicsUpdate plus the patch
3rd Installed NVidia Universal Installer and because of the nvinject wont let me load the Desktop (have to remove it)
so right now my status 1024x768 no QE/CI

nForce 4 Ultra, s939 AMD x64 4200
GeForce 8600GT & GeForce 7300SE (Both work with 10.5.1, none with 10.5.2)

any help will be appreciatte it