a really good way to understand it is listen to older cats like pete rock, primo, some new cats like mf doom and madlib
the tracks they do are usually (as far as sampling) really easy to understand how there built. as far as witha vs 2000. i've never done this (i have a 1680) but you should be able to put your sample down and set a loop point on it. then add what ever drums an stuff you want. but man thats rough. you should invest in a sampler/ drum machine if you can aford the vs2000 you should be able to get your self an mpc.