Be sure to check out Real World Bryce4 by Susan Kitchens - the real gist of it still applies to Bryce5 so don't let the name fool you. Susan has a huge section on the DTE and good section on the origins of Bryce. Susan is a good friend of mine and a great software author. She was there at the very beginning of Bryce and she'll fill in all the missing pieces for you. Scott