preinit.java

Fluid myFluid = new FluidColored("fluff", 0xFF00FF, new ResourceLocation("tconstruct:blocks/fluids/molten_metal"), new ResourceLocation("tconstruct:blocks/fluids/molten_metal_flow"));		FluidRegistry.registerFluid(myFluid);		FluidRegistry.addBucketForFluid(myFluid);

NBTTagList alloysTagList = new NBTTagList();
NBTTagCompound fluid = new NBTTagCompound();
fluid.setString("FluidName", "fluff");
fluid.setInteger("Amount", 1000);
alloysTagList.appendTag(fluid);

fluid = new NBTTagCompound();
fluid.setString("FluidName", "lava");
fluid.setInteger("Amount", 1000);
alloysTagList.appendTag(fluid);

fluid = new NBTTagCompound();
fluid.setString("FluidName", "iron");
fluid.setInteger("Amount", 144);
alloysTagList.appendTag(fluid);

NBTTagCompound tag = new NBTTagCompound();

tag.setString("ore", "Fluff");
tag.setTag("alloy", alloysTagList);
tag.setString("fluid", myFluid.getName());

FMLInterModComms.sendMessage("tconstruct", "integrateSmeltery", tag);