How do I use a .rar file? I am trying to make a Backup of Pandora's Box

[You Putz]

The instructions I have found on the gamefix site are:

Pandora's Box v1.0 (ENGLISH) Fixed Executable [1.0 MB]
Create the following temporary directory:
TempDir : C:\TEMP\CD
Copy the full contents of the original CD to TempDir.
Replace the PANDORA.EXE file with the one from the archive.
Burn the contents of TempDir to a CD-R and use the same CD-Label as the original CD.
Play the game!

It asks me to replace the .EXE file with the one from the archive. The only file there has an extension of .rar? Do I rename the .rar to a .exe, or am I working with incorrect information here?

Thanks!!!!