You can find the source of the new FirstLook demo in your installation folder, usually it is C:/Program Files/Telerik\RadControls for Silverlight Q1 2011 SP1, in the Demos/Examples/ScheduleView/FirstLook folder.
If you downloaded only the ZIP package - there is also Demos folder in it containing all the RadControls examples.
As to the old FirstLook demo, I've it attached it to this thread, please download it and give it a try.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>