OK I did a quick and dirty version off SJ_German_bomb_ab250kg called TOW_FLAM_C_250 using this xdp
<?xml version="1.0"?>
<UnitData>
<General Allegience="" LongName="TOW_FLAM_C_250Kg" ShortName="FLAM_C_250" ModelName="TOW_FLAM_C_250.m3d" BlastDamageScale="1.0" ImpactDamageScale="1.0" FireDamageScale="1.0" Priority="2" Type="weapon" EnteredService="03/01/1943" BlastDamageMod="1" ImpactDamageMod="1" FireDamageMod="1" Category="weapon" Country="germany" Mass="250"/>
<Description String="250kg Bomb"/>
<Weapon Crater="crater_12" ImpactDice="1" ImpactDieSize="1" ImpactOffset="7381" BlastDice="1" BlastDieSize="1" BlastOffset="4152" FireDice="1" FireDieSize="1" FireOffset="98" WeaponType="bomb" BlastRadius="112" ExplodeEffect="fx_gasfire_m" GroundEffect="fx_eto_firebomb_s" WaterEffect="fx_wtrspray_m" Drag="0.3"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
<Effects>
<Effect Type="Track" EffectName="" Location="emitter_firesmoke" MinVel="125" MaxVel="450"/>
</Effects>
</UnitData>
I basically decided from other possible effects listed below and there might be better alternatives
TOW_incendiary_stick_2Kg
<Weapon ImpactDice="1" ImpactDieSize="1" ImpactOffset="500" BlastDice="1" BlastDieSize="1" BlastOffset="150" FireDice="1" FireDieSize="1" FireOffset="2000" WeaponType="bomb" BlastRadius="10" ExplodeEffect="fx_eto_firebomb_s" GroundEffect="fx_eto_firebomb_s" WaterEffect="fx_bltwtr_l" Drag="0"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
<Effects>
<Effect Type="Track" EffectName="" Location="emitter_firesmoke" MinVel="125" MaxVel="450"/>
</Effects>
AvHistory_gb_Flare_Ground_Marker_Pink_2700lb_Internal
<Weapon Crater="crater_25" ImpactDice="1" ImpactDieSize="1" ImpactOffset="8392" BlastDice="1" BlastDieSize="1" BlastOffset="3534" FireDice="1" FireDieSize="1" FireOffset="5100" WeaponType="bomb" BlastRadius="65.6" ExplodeEffect="fx_pink_pansy" GroundEffect="fx_pink_pansy" WaterEffect="fx_wtrspray_l" Drag="0"/>
<Loadouts />
<GunStations />
<DamageBoxes />
<Systems />
<Effects>
<Effect Type="Track" EffectName="bombing_non_flare_snd" PosX="0.0" PosY="0.0" PosZ="0.0" MinVel="60" MaxVel="900"/>
</Effects>
WVA_incendiary_bomb_30lb
<Weapon ImpactDice="1" ImpactDieSize="1" ImpactOffset="350" BlastDice="1" BlastDieSize="1" BlastOffset="301" FireDice="1" FireDieSize="1" FireOffset="1250" WeaponType="bomb" BlastRadius="25" ExplodeEffect="bomb_30lb_expl" GroundEffect="bomb_30lb_expl" WaterEffect="fx_wtrspray_s" Drag=".005"/>
sodium_flare_white
<Description String="sodium flare"/>
<Weapon ImpactDice="1" ImpactDieSize="1" ImpactOffset="0" BlastDice="1" BlastDieSize="1" BlastOffset="0" FireDice="1" FireDieSize="1" FireOffset="1" WeaponType="bomb" BlastRadius="0" ExplodeEffect="__" GroundEffect="__" WaterEffect="fx_sodium_flare_white" Drag="0"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
<Effects>
<Effect Type="Track" EffectName="" Location=""/>
</Effects>
SJ_German_bomb_ab250kg
<Weapon Crater="crater_12" ImpactDice="1" ImpactDieSize="1" ImpactOffset="5906" BlastDice="1" BlastDieSize="1" BlastOffset="1969" FireDice="1" FireDieSize="1" FireOffset="98" WeaponType="bomb" BlastRadius="258" ExplodeEffect="spezzoni_expl" GroundEffect="spezzoni_expl" WaterEffect="spezzoni_water_splashes" Drag="0.3"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
<Effects>
<Effect Type="Track" EffectName="ab_250_sd_2_108" PosX="0.0" PosY="0.0" PosZ="0.0" MinVel="0" MaxVel="900"/>
photoflare
<Weapon ImpactDice="1" ImpactDieSize="1" ImpactOffset="0" BlastDice="1" BlastDieSize="1" BlastOffset="0" FireDice="1" FireDieSize="1" FireOffset="1" WeaponType="torpedo" BlastRadius="0" ExplodeEffect="fx_photo_flare" GroundEffect="fx_photoflare" WaterEffect="fx_photoflare" Drag="0"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
<Effects>
<Effect Type="Track" EffectName="fx_contrail_s" Location=""/>
SJ_German_bomb_sc250kg
<?xml version="1.0"?>
<UnitData>
<General Allegience="" LongName="" ShortName="250kg Bomb" ModelName="SJ_German_bomb_sc250kg.m3d" BlastDamageScale="1.0" ImpactDamageScale="1.0" FireDamageScale="1.0" Priority="2" Type="weapon" EnteredService="03/01/1943" BlastDamageMod="1" ImpactDamageMod="1" FireDamageMod="1" Category="weapon" Country="germany" Mass="250"/>
<Description String="250kg Bomb"/>
<Weapon Crater="crater_12" ImpactDice="1" ImpactDieSize="1" ImpactOffset="7381" BlastDice="1" BlastDieSize="1" BlastOffset="4152" FireDice="1" FireDieSize="1" FireOffset="98" WeaponType="bomb" BlastRadius="112" ExplodeEffect="fx_gasfire_m" GroundEffect="fx_fireball_m" WaterEffect="fx_wtrspray_m" Drag="0.3"/>
<Loadouts/>
<GunStations/>
<DamageBoxes/>
<Systems/>
</UnitData>
Thwe photos are from a quick triaL mission with eto_he111h_f8+es and a loadout
<Loadout Name="8 x 250 Kg Flambos" MissionType="Strike,CAP">
<Hardpoint ID="0" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="1" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="2" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="3" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="4" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="5" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="6" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
<Hardpoint ID="7" PylonType="dr_he111_pylon_null2" PayloadType="TOW_FLAM_C_250" Quantity="1"/>
</Loadout>
The 2nd pic is from som,e distance away and as I have noticed in the past the POV tends to determine the ability to see effects. I also need a target with fire damage effects for better results.