To answer your question, sadly no. There is no real way to "blue screen" or chromakey in AlamDV.
is coming out on the 29th and will do what you are saying and wanting to do!
EDIT: If you were REALLY desperate to do it in AlamDV you could make your bground a plugin and ad it to your footage of the actor on the screen. Then take masks and put it ontop of your actor so they are still there and in front of the background...but after all the trouble you spent, you would be done with it in Chromanator or Premiere or After Effects..etc.
Last edited Fri, 26th Dec 2003, 8:11pm; edited 1 times in total.