There's a few ways to find the associated geometries and textures for things that are being deleted.

If you know the compressed file it came from:
   - Open the file in Winrar (shareware program that opens most compressed formats, including .zip). Winrar maintains the directory structure so that the different folders can be viewed and that will show where all the files are placed on the hard drive.
   - Windows XP and Vista will also navigate through .zip files. Winzip will show all the files in one window, but a file can be right clicked and Properties will show where the file will go.

If you cannot remember what the original file is, open the .cr2 character file or .pp2 prop file in a text editor and search for .obj and .jpg to find where the respective geometry and texture files are located.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon