http://www.mediafire.com/?v0ndezj0h73ytq3 - Main Set of Masks
http://www.mediafire.com/?s488jr7m8034yk8 - Changeling Transformation Mask (I forgot to include it)

How to use.
For the masks with colors in the background, use your programs color keyer to pick the background out and get rid of it.

For the masks with a black background, you need to designate the clip as having a premultiplied background or alpha channel.

-In Sony Vegas you do this by right clicking the clip, go to properties, go to media, and in alpha settings choose premultiplied.

-In After Effects, it might ask you what the alpha channel is when you import it and you select premultiplied.  If it doesn't ask, then it's already recognized that the clip has an alpha channel.