Good evening! I just started using this and I think it is pretty sweet! I've been wanting to see Metallica come on the DLC for a long time but never thought it would happen, then I stumble across customsforge.com ... (^.^) ... Anyway It seems you have to update the App ID for each song you want to add, is there a way to do many at once? or is it only one by one? Thanks ahead of time!