Lt.Overload has put together a custom mission for the Prophecy simulator. You can download it here. A text file is included with the mission briefing and nav map information.
Okay Lieutenant, we have to be brief. 2 Hours ago a Nephilim Carrier Fleet entered the Vega System. Their fighters destroyed the first few lines of defense, and somehow, a large Moray Fighter group snuck past the Confederation Fleet. When our scanners picked up the group, we sent several fighter wings to intercept. Sadly, the wings failed. The Moray group is headed right at us. A Kilrathi wing will be within range to assist us when you launch, and the last of our forces, a few Wasps, are already fighting the group. Quickly get out there and destroy those Morays. The other wings have already transfered to your wing, just get out there and fight for your home.
Our Missions section contains a large number of fan-made missions for anything from the original Wing Commander to Privateer. Playing custom Prophecy missions requires only a few steps:
Download the external missions patch file from here and extract the contents into your Prophecy directory.
Double click on patch.exe to run it.
Place the contents of your chosen mission zip in the Prophecy\Mission directory and rename the .mis file to s0.mis.
Run Prophecy and play the Sim 0 mission from the simulator, which will now have been replaced by the mission of your choice.