Would someone please be kind enough to show me how to setup and use the available nodes in Poser to accomplish this?

What I am wishing to do is use Simon's head texture map from Poser (head, mouth, tongue) but have my texture mapped head instead of Simon's, but letting the mouth and tongue still show from Poser.
I am wanting to do this through masking so users will be able to use Posers textures and my own (ie; illegal to distribute Poser textures, so I couldn't just copy and paste).

If I haven't made this clear let me know and I'll try to explain better what I'm wishing for.

Thanks to any or all that reply.

Comitted to excellence through art.

Awesome, I'll give it a try.

Thanks Angel

Comitted to excellence through art.

Well I'm still able to see the Poser texture underneath mine this way, and that's not what I want. I want my texture to override/mask out the poser head...but I still want to see the mouth and tongue from Poser.
Am I hooking this up wrong or any other suggestions?

Comitted to excellence through art.

Plug the other texture into the Value_2 node, of the Blender; and whatever is white, on the mask(like my Image_Map 2 node) will allow your second texture to show through.  And/or show us a screenshot.

Ahhh, now I see. Works great.
Thanks for explaining that to me.

Comitted to excellence through art.