if you encounter a problem during "unrar" this file, you can solve it by changing the file names:

1. download all 3 files (rar) to the SAME directory;
2. change the file names (in numbers) such that they are in an increasing sequence. For example, the first volume is 111.rar, the second 112.rar and the third 113.rar. You can find out which file is volume 1 by attempting to open it in winrar. The volume number will show up.

hope this help a bit..