billshar,

The little shareware utility here should decompress it for you.

A rar file is compressed file (kind of like a zip file, but different format).  In order to open it you will need a decompressor, like WinRar.  See the following:

http://www.rarlab.com/rar_file.htm

If you do a search for "rar files" on google, you may be able to find alternative/free decompressing software.

Steve