Note, that WebCam Looker and Skype must be running under the same user at Windows - both either under your logged-in user, or System (if both are running as Service, i.e. loading on Windows boot as Service). Otherwise you will not be able to receive messages.
To configure this destination - enter the SkypeID of a user from your contact list at computer with WebCam Looker and text to be sent. As soon as motion will be detected (you want to receive messages on motions, right?
and your destination's SkypeID is also online - you will receive a notification immediately.