Microsoft has been updating the Windows 7 personalization gallery with themes based on occasions and also movies. Two new themes have been added to the gallery- Snow Angels & Narnia: Dawn Treader. While Snow Angels is based on snowflakes during this winter, Narnia : Dawn Treader is based on the new movie which takes you on the Narnian ship the Dawn Treader as they return to the fantastical world created by author C.S. Lewis.