tried adding bwg4 api but it doesn't work :(

src/minecraft/biomesoplenty/configuration/BOPBiomes.java

@@ -1,5 +1,6 @@
 package biomesoplenty.configuration;
 
+import ted80.api.DefaultBiomeList;
 import net.minecraft.world.biome.BiomeGenBase;
 import net.minecraftforge.common.BiomeManager;
 
@@ -88,6 +89,7 @@ import biomesoplenty.worldtype.WTBiomesOP;
 
 import com.google.common.base.Optional;
 
+import cpw.mods.fml.common.Loader;
 import cpw.mods.fml.common.registry.GameRegistry;
 
 public class BOPBiomes {
@@ -192,6 +194,12 @@ public class BOPBiomes {
 
 		//Initialize new world type
 		WTBiomesOP = new WTBiomesOP();
+		
+		if (Loader.isModLoaded("BWG4"))
+		{
+			/* ==== biometypes: 4=hot, 3=wet, 2=norm, 1=cold, 0=tech, 5=island ==== */
+			//DefaultBiomeList.addBiome("Alps", Biomes.alps, 1);
+		}
 
 		//Spawning
 		addSpawnBiome(Biomes.alps);

src/minecraft/ted80/api/DefaultBiomeList.java

@@ -0,0 +1,79 @@
+package ted80.api;
+
+import java.util.ArrayList;
+import net.minecraft.world.biome.BiomeGenBase;
+
+public class DefaultBiomeList 
+{
+	public static ArrayList<BiomeGenBase> allowedBiomes = new ArrayList<BiomeGenBase>();
+	public static String[] biomeList = new String[256];
+	public static int[] biomeType = new int[256];
+	public static int generatorversion = 1;
+	
+	public static void addBiome(String name, BiomeGenBase biome, int biometype)
+	{
+		allowedBiomes.add(biome);
+		
+		for(int i = 0; i < biomeList.length; i++)
+		{
+			if(biomeList[i] == null)
+			{
+				biomeList[i] = name;
+				biomeType[i] = biometype;
+				break;
+			}
+		}
+	}
+	
+	public static ArrayList<BiomeGenBase> getBiomeList()
+	{
+		return allowedBiomes;
+	}
+
+	public static int[] getTypesList()
+	{
+		return biomeType;
+	}
+	
+	public static String[] getStringList()
+	{
+		String[] newbiomelist = new String[biomeList.length];
+		for(int i = 0; i < biomeList.length; i++)
+		{
+			if(biomeList[i] != null)
+			{
+				newbiomelist[i] = biomeList[i] + "=true";
+			}
+			else
+			{
+				break;
+			}
+		}
+		return newbiomelist;
+	}
+	
+	public static String getDefaultString()
+	{
+		String genstring = generatorversion + "&";
+		
+		for(int i = 0; i < biomeList.length; i++)
+		{
+			if(biomeList[i] != null)
+			{
+				if(i != 0)
+				{
+					genstring += ";" + biomeList[i] + "=true";
+				}
+				else
+				{
+					genstring += biomeList[i] + "=true";
+				}
+			}
+			else
+			{
+				break;
+			}
+		}
+		return genstring;
+	}
+}