Mod version 1.2
Included in CivisRomanus Unofficial Fallout 3 Fixes  Cheat Items version 1.0. You need the Fixes.
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Mr. Burke's house in Megaton will become your property, if he is killed during "Power of the Atom" quest.
You will no longer see his corpse in Tenpenny Tower after finishing "Power of the Atom" quest.
Although is no longer his property, you cannot receive "Well Rested" bonus, if you sleep in his bed.
You'll find some interesting stuff in his briefcase.
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Bring a good cognac if you want to invite Lucy West or Moira (or both) to see your new "acquisition".

1. Mr. Burke's body will disappear (faster) from Moriarty's bar only if you loot/steal the key to his house in Megaton.
2. Fix for MS11 quest script processing 1000 times every second, set in LucasSimmsScript when Lucas Simms gets killed by Mister Burke.
If Lucas Simms gets killed by Mister Burke, MS11Fin quest script will process every second, not 1000 times per second, then (the script) will return at default processing value (5s) after Mr. Burke is killed and/or "Power of the Atom" quest is finished.
3. Put an end to "debugTimer" variable in MS11FinScript which counts the seconds (!) passed for nothing, 150 hours (or more) of your entire gameplay.
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New in version 1.2
MS11Fin quest script will also return at default processing value, if you blow up Megaton (Mr. Burke's way).


Credits:
Bethesda.
Lucas Simms' Hat.
The content of my hat.
This beautiful Sunday.

Many thanks to:
Nexus - for allowing us posting our distorted ideas converted into mods.