CrazyTalk 8 only supports a single character per project. If you wish to have two characters talking, then you can setup two separate projects with one character on the left and one on the right and then take the exported videos into a video editor and overlay them.
Generally though if you wish to work with more than one character, you may like to consider
iClone 6 for 3D work and
CrazyTalk Animator 2 for 2D work. Both products support multiple actors in a scene.
Peter
Forum Administrator
www.reallusion.com