Real Environment Pro is screwing me

The absolute moment I try to install this scenery package (it has a "special" window for whatever reason) it just instantly says "an error has occured" and quits, and when I try to back the files up it says: "error: this file does not exist" and that message will not ever go away (ctrl+alt+delete the program to get rid of it). Can anyone look into this problem and see what is wrong with it? I'm sure I did everything right, is this program just broken?
http://library.avsim.net/esearch.php?CatID=fs2004scen&DLID=91533
http://library.avsim.net/esearch.php?CatID=fs2004scen&DLID=91533