It is a while since I did this but If I remember correctly you had to load the helper bones geometires (.obj) in a particular folder and then place the other files where you liked so long as the victoria4.2_settings.txt was in the same place.  Run the script and point the 'figure to have weights injected at the V4.2 cr2.  The 'weight injection pose' at the weight pose included with the zip and the 'Optional pose containing new actor's at the V4WM helper bones.

When run the script should give you another cr2 in the daz V4.2 folder but now a WM versions.  However I cannot see why any mistake here would affect the materials but, on the other hand the inner mouth problems rings a bell.  I remember seeing this before and thinking the inner mouth is selected as it is the first material.  Problem is, while I have distant memories of the problem I cannot for the life of me remeber what I did to fix it. 

 

 

The 

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.