There are 2 flavors of compressed content files immdeiately available: DAZ installers and compressed (rar, zip, etc) files.  The DAZ3D installers will automatically load content in their appropriate folders given manual direction to your Poser folder or external folder containing a runtime folder.  Notice, I said an external folder containing a runtime folder.  This external folder may be named anything you like for purely organizational purposes but, again, it must contain the runtime. 

Most for purchase compressed files found here and on other sites have the runtime hierarchy already correctly set up by the vendor.  This is either manually done or with the assist of 3rd party software.  However, I have come across freebie content not adhering to this convention which can cause many headaches in locating rogue textures, clothing, figures, etc. 

The recommendation to newbies, inspect compressed files thoroughly before uncompressing into rutnime folders.  Create a temporary folder, uncompress your content, and check the content.  Afterwards, move that folder into it's permanent  residence.  If the content was correctly setup, you should find everything under their appropriate category when you open Poser.

@WCSally: BTW, I am going to correct you before you get into a habit, the Poser version you are referring to is PoserPro 2010, not Poser 2010.  You are the second individual to make that mistake in the forum.  And I do mention this because in the future you may need assistance with a problem and someone will ask for the proper version.  There were too many confusing moments when someone posted they had problems with Poser 7 Pro and were chided about which actual version they used.  This is just to make sure that we address the problem correctly because there are distinct differences between the regular Poser and Pro series.