That is indeed the Holy Grail for a little newbie like me... but I'm willing to give it a try!

If you don't mind, I'll like to hear your comments about my plan B and C, in case the "Holy Grail Solution" turns to be a little bit too challenging for me.

Plan B:
Making the facial expressions directy into Maya, moving all the verts with the smooth preview on to see what's really happening. As far as I can see, that would be a lot of work but it´s the only way to see for myself the results I'm actually getting.

Plan C:
Adding polys. My original mesh is about 3,000+ polys. Stepping up my mesh to 12,000 polys mantains all the detail that I already have in mudbox, BUT I'm worried about the UVs going ape on me. So far this solution works perfectly! The texture works, the joints, the skin weights. Everything works! But I'm worried about the UVs AND my PC's performance when I get to the animation and the rendering part.

Thank you... we´re almost there!