Ain't no such thing as an *.rsrc file. I'll bet you mean *.rsr of which there are 2 kinds: "big" ones go in RuntimeGeometries with their matching *.obj files; and the "little" ones are just thumbnail pictures that go with their matching files in Runtimelibraries... (The little thumbs you see when you open "Hair" or "Poses", etc. Poser5 uses *.png instead of .rsr files. ".jpg" files GENERALLY are found in Runtimetextures where Poser uses them for texturing, bump & transparency. Yeah, it's more complicated than all that, but hope this helps.