Unzip the file
If you have the original version of the sim patched with the nocd files, you run the reloaded version batch file.
If you have a later version of the sim that was Starforce free, you run that version of the batch file.
Once the batch file has run, you're all set to go.
The batch file patches your SH3.exe to tell your computer to use more than 2GB of memory to run the sim.