Textures are applied in the same level as the object hierarchy. In other words, if you change the "Mad Scientist" texture, everything will change. If, however, you just change the hand texture, only the hand (and anything below it in the hierarchy). The latter can be a bit tricky, but generally will work. If you are really going to do complex texture mapping, I suggest you use a program, such as Anim8or, that supports UV texture mapping (2D to 3D) and then import the result into Alice.