Andarianedomon, you say Poser is looking for files, Poser does not look for pz3 files under any circumstances, Poser does somtimes look for graphic files (jpg, tif, bum, etc) or geometry files (obj, rsr).

If you followed the steps outilned in post #4 then Poser can't be looking for a graphic file, that means it is almost certainly looking for a geometry file, but could you confirm this by saying which of the above error messages you are getting, A or B?

If you are getting error A the geometry file for the box prop is in the wrong location, or the rsr is corrupt, as the Poser installation should have installed the file to the right location, this sujests that there is a serious problem with the installation.

Please use the Windows Find utility to assertain the path for the 'BOX.PP2' file, and post the results here in this thread.