^ Make a 16GB Xbox360 Data Partition on your external HDD. Then connect it with your PC and open the Data Partition Files using Xtaf GUI. From there, the rest of the file structure is just like an internal Xbox360 HDD. So, according to the required file structure, inject the DLC files into the Data Partition files using Xtaf GUI. Then connect the external HDD back to the console. If the files were copied to the correct place, then the DLC will appear in the Xbox360.