In my earlier post I spoke of that problem that Silverlight 2.0 beta had with not allowing interactive support in the designer. I just finished reading a Blog by Scott Guthrie where he mentions this explicitly. So, the feature is not there yet, and I should not have griped about it :<
I also started to see strange crashes in my IE browser. Seem to happen around the same time as installing Silverlight, however found out that it was actually caused from Flash. As soon as I upgraded Flash to the latest version, crashes disappeared.