This is the URL you send the *.ins file or a *.xyz file, generated with ortep to obtain a *.wrz file. The point is, that the file is stored under temporary internet files un WIN2000 for example. But it may work in a different way on your computer. Please feel free to ask me about it.
   Werner
http://www2.chemie.uni-erlangen.de/services/vrmlcreator/index.html