Like this...

BuffChasticBurstTarget.entity

TXT
entityType "Buff"
onReapplyDuplicateType "PrioritizeOldBuffs"
buffStackingLimitType "ForAllPlayers"
stackingLimit -1
buffExclusivityForAIType "ExclusiveForAllPlayers"
isInterruptable FALSE
isChannelling FALSE
numInstantActions 2
instantAction
    buffInstantActionType "ApplyBuffToTargetsInRadius"
    instantActionTriggerType "OnDelay"
    delayTime 0.000000
    buffType "BuffChasticBurstAOE"
    targetFilter
        numOwnerships 1
        ownership "Enemy"
        numObjects 5
        object "CapitalShip"
        object "Frigate"
        object "PlanetModule"
        object "Titan"
        object "Corvette"
        numSpaces 1
        space "Normal"
        numConstraints 0
    range
        Level:0 2000.000000
        Level:1 2500.000000
        Level:2 3000.000000
        Level:3 3500.000000
    maxTargetCount
        Level:0 -1.000000
        Level:1 -1.000000
        Level:2 -1.000000
        Level:3 -1.000000
    effectInfo
        effectAttachInfo
            attachType "Center"
        smallEffectName "TitanAbility_Cherubim_ChasticBurst_Target_Medium"
        mediumEffectName "TitanAbility_Cherubim_ChasticBurst_Target_Medium"
        largeEffectName "TitanAbility_Cherubim_ChasticBurst_Target_Large"
        soundID ""
instantAction
    buffInstantActionType "ApplyBuffToTargetsInRadius"
    instantActionTriggerType "OnDelay"
    delayTime 0.000000
    buffType "BuffChasticBurstHeal"
    targetFilter
        numOwnerships 1
        ownership "Friendly"
        numObjects 5
        object "CapitalShip"
        object "Frigate"
        object "PlanetModule"
        object "Titan"
        object "Corvette"
        numSpaces 1
        space "Normal"
        numConstraints 0
    range
        Level:0 2000.000000
        Level:1 2500.000000
        Level:2 3000.000000
        Level:3 3500.000000
    maxTargetCount
        Level:0 -1.000000
        Level:1 -1.000000
        Level:2 -1.000000
        Level:3 -1.000000
    effectInfo
        effectAttachInfo
            attachType ""
        smallEffectName ""
        mediumEffectName ""
        largeEffectName ""
        soundID ""
numPeriodicActions 0
numOverTimeActions 0
numEntityModifiers 0
numEntityBoolModifiers 0
numFinishConditions 1
finishCondition
    finishConditionType "AllOnDelayInstantActionsDone"

BuffChasticBurstHeal.entity

TXT
entityType "Buff"
onReapplyDuplicateType "PrioritizeOldBuffs"
buffStackingLimitType "ForAllPlayers"
stackingLimit -1
buffExclusivityForAIType "ExclusiveForAllPlayers"
isInterruptable FALSE
isChannelling FALSE
numInstantActions 1
instantAction
    buffInstantActionType "RestoreShieldPoints"
    instantActionTriggerType "OnDelay"
    delayTime 0.000000
    shields
        Level:0 250.000000
        Level:1 455.000000
        Level:2 660.000000
        Level:3 865.000000
numPeriodicActions 0
numOverTimeActions 0
numEntityModifiers 0
numEntityBoolModifiers 0
numFinishConditions 1
finishCondition
    finishConditionType "AllOnDelayInstantActionsDone"

how do you add a new file to the entity.manifest?

Okay, this is getting on my nerves. 

I created a folder and named it Developer.

within that folder i created another one called GameInfo.

I copied and pasted CovertData_RebellionApplication, entity.manifest, and msvcr80.dll files.

Then i copied and pasted individual entity files of abilites and related buffs that i wanted to change from the original Rebellion GameInfo and pasted them into the MY gameinfo folder.

I proceeded to convert them by right clicking each file and clicking open, then the command prompt pops open and im assuming converts them. I then right click the each file and click edit in notepad ++. It pulls up in notepad in text and i adjust each ability and buff profile i BELIEVE correctly.

then i followed the mod path the Rebellion game indicated and found it. Inside it was a text document called EnabledMods.

After that I kinda just winged it.

I copied and pasted my Directors folder into the folder that contained the text document. I did NOT paste it into the text document. i did NOT remove CovertData_RebellionApplication, entity.manifest, and msvcr80.dll files from my GameInfo folder.

I then started Rebellion, went to the mod section and it showed my Director folder. i was estatic! I enabled, then went to start a new game. I built a capital ship and a few structers that SHOULD have had an adjusted ability, but it didn't.

So somewhere along the line i screwed up.

i did and the game had a runtime issue and crashed

If the game crashed and the checksum wasn't zero, that means you made an error with your modded files. Try running it with the Developer.exe and see what error messages it gives you.

Beggars can't be choosers friend. The game is still in beta, people aren't going to be wasting their times with Rebellion guides yet when changes are still frequent. And most guides are for learning how to mod from the ground up or documentation, not guides of how to do specific things (though there are some for new races and modeling).