OK well you could try experimenting with some of the registry settings...like this
\SetReg [name=aa f0=1]
That will open her mouth - change the value of f0 to alter how much. Other registry names include ey,uh,b,ch,d,iy,ow,ih,th,s,g,f,eh,uw... these are simply the shapes the mouth makes when making sounds. So just change the name parameter to alter those too. So you can also do things like this...
\SetReg [name=iy f0=0.8]
Also there are switches you can turn on and off...
\SetSwitch [Switch= visemes State= aa ]
The States match the registry names so you can also do ....
\SetSwitch [Switch= visemes State= ow ] and all the rest.
Hope that helps.
btw, when using switches use...
\SetSwitch [Switch= visemes State= off]
...to turn of the switches and close her mouth.