Depends, a lot of figures reference the original Objects that come with Poser. Since you already have the object in your Poser folder, the cr2 is all that's needed. Just install the CR2 and RSR file in a folder in runtime/libraries/character (or someplace similar depending on what kind of figure it is). Ummm, if the rsr file is more than a few K bytes in size, it might be Poser's binary form of an Object. In that case it needs to go in the Geometries folder. Sometimes you'll also see a .pcf file, this means you need to run Objaction Mover to decode the PCF into an object file. And sometimes, the uploader screws up and forgets to include a needed file. :) Your best bet is the readme, if there is one, or contacting the creator of the file.