Alright, I'm having a little trouble with textures and I'm not really sure if it's truly Carrara based or not, but after I load G2 to an empty scene, I add a new texture set to the figure and the figure becomes defaulted to black color maps, and no textures. Not even for the mouth or eyes, etc. I tried saving it like that and then reopening the file, thinking that it would remember the texture set and open with the applied textures, but the figure was still just a black color map all around. There is one map set that does work when applied, and that is the "Iray" set. And I have no idea why that is.

Any help out there?!

I have never had this problem with V4, but there's a way to handle the shaders that might be a workaround. Load all your textures on the figure, then grab that colorful "multiple shading domains" sphere at the top of the list. With the shaders tab open in the browser, drag and drop the sphere into your shader library. Next time you load the figure, go to the shaders and drag that shader back to the multiple domains sphere for that figure.

Typical of my attempts, I keep getting an "I/O" error when I drag and drop.

You will have to go to the texture room and reset all your texture settings. Before you do that go to edit/remove unused masters/consolidate shaders . Studio material settings do not work in carrara.

A lot of the Genesis 2 character material presets use a DAZ Studio-only SSS shader base and since Carrara has no idea what to do with that it replaces it with just black. Like Sueposer and manleystanley say, the only work around is to manually load the textures and then save the master shader so you can re-use it later.