and see if there is an archive of older versions.
Google may be able to help you here too.
I'm running OS 10.4.11 and downloaded silverlight back in 2009. Late last year I received a notification from Apple that a new version was available, so I downloaded and proceeded to iinstall. But it stopped and said it would not run on my OS version. In the process it apparently disabled the installed version as I have not been able to load the website that used Silverlight since. So the question is how do I start all over and reinstall the original version which I believe is 08-42-08.pkg?