It's not that simple. Here's what you have to do: Open Hardpoint.xml and hit CTRL+F. Search for Nebulon. You'll find things like these: HARD_POINT_WEAPON_LASER The "FL" thing is the position. It is F(Forward)L(Left), R is Right and B is Backward. I suggest making it in BL (BackwardLeft). If you want to replace it then change that one and if you want to add a new one over that one copy it. Ok, let's say you've copied it. First edit the name into this: Then you must edit the Type into this: HARD_POINT_FIGHTER_BAY Then the Tooltip Text into this: TEXT_FIGHTER_BAY_HARDPOINT And allmost done, the death exsplosions into this: Large_Explosion_Space_Empire Unit_Hardpoint_Bay_Death Ok, now delete everything BELOW this: HP_B-L_EMITDAMAGE NOTE: Do the same if replacing. Good, now save and close. Open Spaceunitsfrigates.xml. Hit CTRL+F and search for Nebulon (actually it's the first). Now scroll down to . Edit it into this: ABILITY_COUNTDOWN, SIMPLE_SPACE_LOCOMOTOR, TARGETING, REVEAL, HIDE_WHEN_FOGGED, UNIT_AI, ASTEROID_FIELD_DAMAGE, DAMAGE_TRACKING, ION_STUN_EFFECT, NEBULA, SPAWN_SQUADRON Below it add this: Rebel_X-Wing_Squadron, 1 5 Rebel_X-Wing_Squadron, 6 If you want it to spawn more change the . If you want it to spwan other fighters then change the Rebel_X-Wing_Squadron or copy it and replace Rebel_X-Wing_Squadron with another fighter. Now scroll down to . Edit it into this: HP_Nebulon_Weapon_FL, HP_Nebulon_Weapon_FR, HP_Nebulon_Weapon_BL, HP_Nebulon_Weapon_BR, HP_Nebulon_Engines, HP_Nebulon_Fighter_Bay EDIT: That's the basic you posted,but you made some mistakes. This ^ way it works.