diff --git a/src/main/resources/config/filler-ae2.xml b/src/main/resources/config/filler-ae2.xml
index f181b107..a93e6678 100644
--- a/src/main/resources/config/filler-ae2.xml
+++ b/src/main/resources/config/filler-ae2.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<warpdriveWorldGeneration version="1">
+<warpdriveWorldGeneration version="1" mods="ae2" >
 
-    <mod name="ae2" />
-
-	<ore name="ae2:quartz" weight="70" category="uncommonOre" />
+    <FillerSet group="uncommonOres" >
+	   <filler name="ae2:quartz" ratio=".01" />
+	</FillerSet>
 	
 </warpdriveWorldGeneration>
\ No newline at end of file
diff --git a/src/main/resources/config/filler-default.xml b/src/main/resources/config/filler-default.xml
index 07f86294..3d24f96b 100644
--- a/src/main/resources/config/filler-default.xml
+++ b/src/main/resources/config/filler-default.xml
@@ -1,28 +1,40 @@
 <?xml version="1.0" encoding="utf-8"?>
 <warpdriveWorldGeneration version="1">
-	<ore name="minecraft:coal_ore" weight="100" category="commonOre" />
-    <ore name="minecraft:iron_ore" weight="70" category="commonOre" />
+
+    <FillerSet group="commonOres" >
+	   <filler name="minecraft:coal_ore" weight="100" />
+       <filler name="minecraft:iron_ore" weight="70" />
+    </FillerSet>
     
+    <FillerSet group="uncommonOres" >
+        <filler name="minecraft:redstone_ore" weight="40" />
+    </FillerSet>
     
-    <ore name="minecraft:redstone_ore" weight="40" category="uncommonOre" />
+    <FillerSet group="rareOres" >
+	   <filler name="minecraft:gold_ore" weight="20" />
+	   <filler name="minecraft:diamond_ore" weight="10" />
+	   <filler name="minecraft:lapis_ore" weight="15" />
+       <filler name="minecraft:emerald_ore" weight="15" />
+       <filler name="warpdrive:iridiumBlock" weight="1" />
+    </FillerSet>
     
-	<ore name="minecraft:gold_ore" weight="20" category="rareOre" />
-	<ore name="minecraft:diamond_ore" weight="10" category="rareOre" />
-	<ore name="minecraft:lapis_ore" weight="15" category="rareOre" />
-    <ore name="minecraft:emerald_ore" weight="15" category="rareOre" />
-    <ore name="warpdrive:iridiumBlock" weight="1" category="rareOre" />
+    <FillerSet group="overworld" >
+        <filler name="minecraft:stone" weight="200" />
+        <filler name="minecraft:sand" weight="30" />
+        <filler name="minecraft:dirt" weight="50" />
+    </FillerSet>
     
-    <ore name="minecraft:stone" weight="200" category="overworld" />
-    <ore name="minecraft:sand" weight="30" category="overworld" />
-    <ore name="minecraft:dirt" weight="50" category="overworld" />
+    <FillerSet group="end" >
+        <filler name="minecraft:end_stone" weight="200" />
+        <filler name="minecraft:sand" weight="20" />
+        <filler name="minecraft:obsidian" weight="20" />
+    </FillerSet>
     
-    <ore name="minecraft:end_stone" weight="200" category="end" />
-    <ore name="minecraft:sand" weight="20" category="end" />
-    <ore name="minecraft:obsidian" weight="20" category="end" />
-    
-    <ore name="minecraft:netherrack" weight="300" category="nether" />
-    <ore name="minecraft:quartz_ore" weight="20" category="nether" />
-    <ore name="minecraft:glowstone" weight="40" category="nether" />
+    <FillerSet group="nether" >
+        <filler name="minecraft:netherrack" weight="300" />
+        <filler name="minecraft:quartz_ore" weight="20" />
+        <filler name="minecraft:glowstone" weight="40" />
+    </FillerSet>
 	
 	
 	
diff --git a/src/main/resources/config/filler-ic2.xml b/src/main/resources/config/filler-ic2.xml
index 1bc2f69b..a46fe488 100644
--- a/src/main/resources/config/filler-ic2.xml
+++ b/src/main/resources/config/filler-ic2.xml
@@ -1,11 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
-<warpdriveWorldGeneration version="1">
+<warpdriveWorldGeneration version="1" mods="ic2" />
 
-    <mod name="ic2" />
-
-	<ore name="ic2:tin_ore" weight="70" category="commonOre" />
-    <ore name="ic2:copper_ore" weight="70" category="commonOre" />
+    <FillerSet group="commonOres" >
+    	<filler name="ic2:tin_ore" ratio=".05" />
+        <filler name="ic2:copper_ore" ratio=".06" />
+    </FillerSet>
     
-	<ore name="ic2:platinum_ore" weight="20" category="rareOre" />
+    <FillerSet group="rareOres" >
+	   <filler name="ic2:platinum_ore" ratio=".001" />
+	</FillerSet>
 	
 </warpdriveWorldGeneration>
\ No newline at end of file