Note: These effects take advantage of the effects architecture of Windows Movie Maker 6.0 and therefore will not work in XP.
There are two installers depending on whether you are running WMM 6.0 on a 32-bit or 64-bit version of Windows. The installer will put the necessary files into, C:\Program Files\Movie Maker\Shared.
Windows Movie Maker 6.0:After installing, you'll have a couple new effects for decreasing contrast and a couple for increasing contrast. If you need a stronger effect, apply the effect several times. You can also customize the .xml if you want other contrast settings. Enjoy!
Blaine's Contrast Effects (32-bit)
Blaine's Contrast Effects (64-bit)
If you have any questions, feel free to post them in the original forum post that inspired these effects.