Under normal circumstances, the Windows XP system is unable to view thumbnails of PSD files generated by Photoshop. PsIcon is a patch that helps Windows XP users view PSD file thumbnails.
The usage of PsIcon is quite simple. Just copy the two extracted files, psicon.inf and psicon.dll, to the C:\Program Files\Common Files\Adobe\Shell folder (create the folder if it does not exist), then right-click the psicon.inf file and select "Install". Below is a demonstration image from the webmaster.