No, changing a core file and doing nothing else won't change anything.
<?xml version="1.0" encoding="ISO-8859-1"?>
<RaceConfigs>
<DataChecksum NoParse="1">
<Ignore>DisplayName, ShortName, Capitol, Description, UnitSkinColor, UnitHairColor, UnitClothColor, BuildingPrimaryColor, BuildingSecondaryColor, BuildingRoofColor, BuildingStyle, UnitStyle, WorkerName</Ignore>
<Translate>DisplayName, ShortName, Capitol, Description, WorkerName</Translate>
</DataChecksum>
<RaceConfig InternalName="EmpireOfResoln">
<EnvironmentTerrainType>4</EnvironmentTerrainType>
</RaceConfig>
</Raceconfigs>
Start elemental, make sure "use mods" is on in options, start a new game.