Scorched Earth

I downloaded one of my favorite old game before but it wont work when I try to start it up. I extract the RAR file onto my desktop and click SCORCH.exe and this message comes up

[Location of SCORCH.exe]
Invalid startup directory, please check your pif file. Choose 'Close' to terminate the application.

And beneath that a single button with 'Close' on it.

I don't know what the problem is.