I`ll give only the Bare-Bones-Basics here as you should experiment yourself along these lines and try it for your OWN taste.
essentialy it consists of a cream cheese (something you can easily mash with a fork in a bowl) and Liquid Smoke.
now I Know it sounds strange, but it REALLY REALLY does work :)
I just made one for myself, again a cream cheese + Wrights concentrated Hicory smoke with an equal amount of mayo as the cheese and a dash of chili sauce.
It`z t3h R0x0r!