Great tutorial, this methods great if you dont have the TU file or DLC unlocked however i think ive found a lil easier method if all the files come organised ..
My Method
Step 1: Download DLC and Check the contents of DLC most found on torrents contain a TU file and is organised within two folders e.g. 58580823\00009600\
Step 2: Copy the folder contents & TU file to pendrive
Step 3: Place the TU file in the cache folder of your Xbox 360 HDD usually HDD1\CACHE
Step 4: Place the folders to HDD1\Content\0000000000000000
Step 5: Run XM360, select DLC if item it locked simply unlock it by pressing A
That it! .. Now enjoy your new DLC
I also noticed that your tutorial fails to mention that you have to place the TU file in HDD1\cache for the Xbox 360 to register the new map pack even when its unlocked with Yaris-Swap or did yours work without the TU file, i personally didnt have sucess this way maybe i was doing something wrong
I also think it would be quicker to use XEX Menu or FSD to transfer content from pendrive straight to HDD rather than FTP it over, but then again thats just me. Finally isn't XM360 able to unlock DLC the same way of which Yaris Swap does it?