Here is a tutorial covering the basics of chroma keying using keylight in After Effects 7. In my personal opinion Keylight is the very best you can use.
Darth Maul and Micro-Organisms: Inside George Lucas's Cancelled Star Wars Sequel Trilogy
How to Automatically Convert DVD Subtitles to SRT on Mac
The $4 Billion Divorce: Inside the Awkward, Painful Sale of Lucasfilm to Disney
The Rift That Broke the Whip: Inside Lucas, Spielberg, and Harrison Ford's 'Furious Rows' Over Indiana Jones
Breaking the Endless Loop: Why Star Wars Needs an Origin Story
