This video shows newbies how to get extra title animations, video effects and video transitions. It shows where to download the XML files that contain the "extras" and how to make them work in their Windows Movie Maker. The overview of this process is pretty simple, below are the steps:

Download XML from WMM Forum > Create AddOnTFX Folder > Place XML into AddOnTFX > Restart WMM

Dictionary:
XML = Extended Markup Language | WMM - Short for Windows Movie Maker

For further information, visit: http://www.youtube.com/watch?v=Z1EeTNTMHDU