To play the missions, unzip the .FS2 file into your FREESPACE2\DATA\MISSIONS\ directory. Then you will be able to see the mission in the Tech Room > Mission Simulator > Single Missions area in FreeSpace 2.
Here are the missions I've made so far:
|Out of the Depths||
My first serious mission, "Out of the Depths" reads like a book. This mission takes place during the events immediately before the opening of the Charon Portal in the BlackWater Operations campaign. Fly patrol around the Alpha Centauri Research Center. There's even a bit of fiction to go along with it!
Not a serious mission... Ever hear of the "Shivan BBQ Theory"? Well now's your chance to prove it right!