Attached Link: http://www.soft-rabbit.com/

The Mac has a powerful (which also means complex) file system. Each file has at least two parts, called a Data Fork and a Resource Fork. The Data Fork contains the normal data that you would expect to find in a file. The Resource Fork can contain many things. It always contains the Creator and File type that you were talking about. That is why Mac files don't need any extension (the .xxx thing at the end of the file name). In Poser library entries (files such as .cr2, .ppt, pz2, .fc2, .hr2, etc.), the Resource Fork also contains the pictures (thumbnails) that appear when you look in the libraries. Apparently, the Resource Fork for the Geometries files also contain some extra information, but it's not clear just what that is. When Poser was ported to Windows, there was no mulitple-fork capability. So the authors of Poser used a common technique: they just created two files, one for each fork. The Windows version of Poser knows how to correlate the information, based on the file name. By convention in the Poser community, almost all items posted either in FreeStuff or in the stores is posted in Windows format. Hence the separate .cr2 and .rsr files, and the ZIP file compression format. MartinC created his breakthrough program that converts the PC format to Mac format (it can also go in the other direction, for when you create stuff to share). This program has saved the day for just about everyone, Mac and Windows users alike. Only one version of the files need to be uploaded, and it can be used on both platforms. Get MartinC's program at http://www.soft-rabbit.com/ and Pose happily ever after! - JimX