The Foundry Keylight v2.1v10 for ae cs4-xforce2

KEYLIGHT is an award-winning production-proven blue and green screen keyer. KEYLIGHT is simple to use and is particularly good at tackling reflections, semi-transparent areas and hair. Because spill suppression is built in, often selecting the screen colour is all you need to do to extract the matte and seat the foreground into the background so it looks photographed rather than composited.

Crack tutorial :

Read the install.txt

For windows and Ae 32bit