hmm!I can only say I usually find pose sets under pose if they are purchased from daz.Do you make sure that if given the choice you go to the folder where DS is stored on your HD and click on contents and install into that file.The Daz installer does all the rest.

If you are installing from a zip from another site then you need to read the read me file to get an idea where to place the differing files.Frankly sometimes they forget to do this..Then I just navigate to content/runtime/libraries/and put it in whatever file seems appropriate. ie.pose/props/hair...However this is not ideal as you will inevitably have to search for either the object or the textures.I find by a bactrack search up to the runtime file usually solves this problem.