For some reason the Microsoft Silverlight installer thinks hackintoshes are powerPCs.  There’s a simple workaround for this:

Download the Silverlight  plugin for Mac OSX.
Mount the .dmg file
Drag the Silverlight.3.0.pkg file to your desktop
Unmount the .dmg – not required now
Right click on “Silverlight3.0.pkg” and choose the “Show Package Contents” menu item.
Double click on the “Contents” folder.
Double click on the “Resources” folder.
Drag and drop the file “InstallationCheck” to the trash.
Close out the folder you’re working in.
Finally double click on the “Silverlight3.0.pkg” package, and it should install fine now.

VIA Msi Wind Forums • View topic – Installing Microsoft Silverlight v2 on OSX (Advent 4211).

Tags: Advent, Hackintosh, Leopard, Mac, Microsoft, MSI, MSI WIND, OSX, Silverlight, Trash, wind