Seems like you've got the grip on it! The file that is absolutely essential to place in the correct folder is the obj file. The cr2 will reference the obj file location with the full path when the character is loaded. If the obj file is not there, you're in trouble. If you encounter a problem with cr2's not finding the obj file, you can open the cr2 in a text editor, it is actually just a text file. Near the beginning of the text, you will find the path to the obj file. Make sure that it's where the obj file is. If you for some reason want to organize your obj files differently, you can edit the path directly in the cr2 file using the text editor. I might not be the right person to explain the exact technical difference between obj and cr2 files, but look at it this way: The obj file is the actual geometry, the mesh that builds the model. The cr2 contains all the morph and pose dials that lets you control the mesh. You can regards the cr2 as the link between the mesh in the obj file and the Poser user interface. To get a deeper understanding of how Poser works, you can open e.g. face and pose files (fc2 and pz2) in the text editor as well and see that they are just a text representation of the morph dial settings and (sometimes) instructions on how to apply textures and colors.