Here is how i was able to get Silverlight 3 to install on on my hackintosh.
I am running Kalyway 10.5.2

At first the silverlight installer was telling me I was running a PPC (...erm yeah o.k) and it was unable to install,

After searching for a while I discovered this kext:
http://netkas.org/?p=58
(Install using kext helper)

Then I followed the instructions on this site
http://www.tech-recipes.com/rx/3707/mac-os...omment-16083759

and hey presto silverlight worked.

Hope this helps

I hold no responsibility if you mess up your install this is just info I have collated.

After applying this fix the 64 bit mode in 10.6 doesnt work anymore, does somebody know how to fix this ?

I found something regarding this earlier today. I found out that after you download silverlight. Extract the package onto your desktop. and check the contents inside. There would be a file in there that says installation check I believe. Delete that, and you should be able to install silverlight.

I installed this Silverlight, how to verify it was running properly?

Yeah, that worked for me and was easy too!

Machine:
Gigabyte G31M-ES2L
4 GB
Intel E5200 @ 2.5 GHz
Rosewill RC-400 / Realtek 8169SC

OS 10.5.7 Retail Install
ALCinject.kext
AppleDecrypt.kext
AppleHDA.kext
AppleSMBIOSEFI.kext
Disabler.kext
OpenHaltRestart.kext
RealtekR1000.kext

Help please.
I have never been able to get Netflix streaming working on this machine. I have successfully been able to install first a hacked version of Silverlight 2.0 and today downloaded 3.0, removed the hardware check from the package and installed 3.0. The problem that I have is that NetFlix always gives me an Error 8152 DRM.

I have tried running with both the boards built in ethernet and with a Rosewill / Realtek card with the motherboard ethernet turned off in the BIOS. None of this has helped.

Everything else works perfectly and the machine has been up and running for 9 months problem free as an HTPC.

Any advice would be welcome at this point