Here is the table data for the Nightmare fighter.
Don't know whether location is important, I put it at the end of the Shivan fighters, right before the SB Nephilim.
$Name: Nightmare Fighter
$Short name: NFighter1
$Species: Shivan
+Tech Description:
XSTR(
"The Nightmare fighter is more commonly referred to as a 'swarmer'. Small, weak, but well armed and agile, these fighters can overwhelm foes in seconds when used in swarms of 6 or 12. The GTVI has theorised that these fighters may be advanced drones, but this cannot be confrimed until one is captured.", 3142)
$end_multi_text
$POF file: nfighter01.pof
$Detail distance: (0, 200, 600, 700)
$Show damage: YES
$Density: 1
$Damp: 0.2
$Rotdamp: 0.2
$Max Velocity: 25.0, 25.0, 95.0
$Rotation time: 3.0, 3.0, 3.0
$Rear Velocity: 25.0
$Forward accel: 3.0
$Forward decel: 1.5
$Slide accel: 2.0
$Slide decel: 2.0
$Expl inner rad: 15.0
$Expl outer rad: 55.0
$Expl damage: 15.0
$Expl blast: 1000.0
$Expl Propagates: NO
$Shockwave Speed: 0.0
$Default PBanks: ( "Nightmare Fighter Laser" )
$Default SBanks: ( "Nightmare Missile Swarm")
$SBank Capacity: ( 100 )
$Shields: 200
$Shield Color: 255 64 255
$Power Output: 1.5
$Max Oclk Speed: 120.0
$Max Weapon Eng: 100.0
$Hitpoints: 75
$Flags: ( "fighter" )
$AI Class: NightmareNorm
$Afterburner: YES
+Aburn Max Vel: 0.0, 0.0, 195.0
+Aburn For accel: 0.7
+Aburn Fuel: 300.0
+Aburn Burn Rate: 70.0
+Aburn Rec Rate: 25.0
$Countermeasures: 20
$Scan time: 2000
$EngineSnd: 132
$Closeup_pos: 0.0, 0.0, -28
$Closeup_zoom: 0.5
$Shield_icon: shieldNfight1
$Score: 15
$Trail:
+Offset: 0.255 -3.76 2.7
+Start Width: 0.25
+End Width: 0.05
+Start Alpha: 1.0
+End Alpha: 0.0
+Max Life: 1.0
+Spew Time: 120
+Bitmap: Contrail01
$Trail:
+Offset: 0.66 -3.76 2.7
+Start Width: 0.25
+End Width: 0.05
+Start Alpha: 1.0
+End Alpha: 0.0
+Max Life: 1.0
+Spew Time: 120
+Bitmap: Contrail01
$Trail:
+Offset: -4.49 4.079 2.64
+Start Width: 0.25
+End Width: 0.05
+Start Alpha: 1.0
+End Alpha: 0.0
+Max Life: 1.0
+Spew Time: 120
+Bitmap: Contrail01
$Trail:
+Offset: 5.37 4.1 2.6
+Start Width: 0.25
+End Width: 0.05
+Start Alpha: 1.0
+End Alpha: 0.0
+Max Life: 1.0
+Spew Time: 120
+Bitmap: Contrail01
$Subsystem: sensors, 10,0.0
$Subsystem: communications, 10,0.0
$Subsystem: engine, 35,0.0
$Subsystem: weapons, 15,0.0
$Subsystem: navigation, 5,0.0
One final note is that the game seems to run perfectly fine even wth these errors....