In regards to cold smoking, I am not sure this is a tried and true method that works with everything, but this is how I make my Smoked Cheese ball. First I use 3 blocks of cream cheese, a small package of Feta cheese, (feel free to experiment here:try blue cheese, Parmesan,etc.) I then add some cheyenne pepper garlic powder, black pepper, cumin, McCormick apple wood rub ( I usually just "eyeball" or guess at amounts of each ingredient) then I slice up the small packages of meat (beef,corn beef,etc) and I like to add the tiny little pepperonis too. Then about a tablespoon of Worcestershire sauce (and some Ghost Pepper sauce if you are into hot/spicy flavors) and some green onions. Mix everything together in a large bowl and roll into a ball. I like to use a "sharp flavored cheese" as a crust (like Parmesan, asiago, etc) after forming ball and rolling in crust cheese place in fridge for 30 minutes or so to let it firm up a bit. Then take a handful of wood CHIPS and put over 2 to 5 pieces of light charcoal (as you want the smoke, not the heat) and cover the drum/grill/etc for about an hour (maybe 2) and let it rest after it gets a good smokey covering on it. Serve with crackers,or chips.