These are pretty simple and easy to follow.
All rules remain full thrust style unless otherwise noted here.
Torpedos work in the same manor as the Puls Torpedos in the Full Thrust rules. For every 10pts of Damage the FASA Photon Torpedo causes roll a D6 for Damage in Full Thrust. Use your discression. I tend to round up or down using 15 as the break point when converting the FASA Photon Torpedos. I also explain the variable damage as proximity fuses, some detonate close in, others far out.