The .pp2 and the .rsr file goes in a folder of your choice under: runtimelibrariesprops If they are placed there, you will find them under "props" in Poser. If there is a .obj file as well, it should be placed in runtimegeometries in a folder that the creator of the prop usually specifies in the readme file. If not, you can open the .pp2 file in a text editor, the correct path to teh .obj file is stated in the beginning of the .pp2 file. The .obj file must be in the correct folder, otherwise you get an error message when loading the prop.