Netflix use to use Windows Media player extensions and such but out of nowhere they switched to SilverLight 2.0. Thats great for the Windows Fanboys and all but there are plenty of issues with Macs running it. First off when you try and install Silverlight you get a InstallationCheck error claiming your system is a PPC even if your mac is Intel. Very simple way around this is to view the contents of the install package file, go into resources and delete the InstallationCheck file. From there SilverLight will install.

Now to fix the pesky DRM 8152 error from Netflix media player. To fix this you will have to use a Hackintosh system file called AppleSMBIOSEnabler.kext. You can use a program called KextHelper to install it or issue the proper permissions via terminal

sudo chown -R root:wheel /System/Library/Extensions/AppleSMBIOSEnabler.kext
sudo chmod 0755 /System/Library/Extensions/AppleSMBIOSEnabler.kext

Reboot and go to netflix and try it out. So far this has been tested with 10.5.3 and 10.5.5. The kext was meant to be used with 10.5.6 so beware if you try it with 10.5.7.

Also this has been only tested on a Hacintosh and a PPC mac but I have heard this has effected older Intel Macs as well.