Seller financing how the money gets transferred?

[John Currey]

I've been listening to several of the BP podcasts mentioning seller financing. It's sounds like a great tool at times. What I don't understand is how you get the money to people. 

let's say you buy a 100k house on seller financing with 0 down and 1k a month payments. Am I mailing a check to the seller every month? 

pace Morby tells a story about buying a truck on seller financing, how would he make payments on the truck?