Hi Robert,
First create a seq with the model you are going to input to , let's say singing face 1 only , and Save it say as xxx.
The select the pgo file as input and xxx as output, then select the face type as Coro.
Then in the mapping , select the model to map to....it must be singing face 1 which has been defined in xxx.
Then do the mouth to channel mapping , say only do o mouth and top lip, and then generate seq.
If all okay, xxx will be overwritten .
Then open xxx as a seq , render.