Here is where to place the files in this zip

SAC.ani		-	Freespace/Data/Interface
PieceofHell.FSM	-	Freespace/Data/Missions
planet02.pcx	-	Freespace/Data/Maps
navbuoy.pof	-	Freespace/Data/Models
generic.wav	-	Freespace/Data/Voice/Special

The Planet model is named so that it repaces the Navbuoy model so no
table changes are needed (it is not nesesary to play the mission though)
It is also worth noting that the texture seems to not display properly
in software render, I am working on this problem.

You can use the planet model and the animation in your own missions if you
wish as long as I am credied with their creation- have a go at making your
own texture maps for the planet.