how do yo make programs of sounds?

I'm tryin to learn how to make programs that will be looped and mapped out across the MPC banks.... 1.) how do I loop a sound correctly 2.) how do you make programs? Please help!

http://www.midicase.com/mpceditor/

this is how you can make programs while you talk to us on your PC........to loop a sound correctly you have to make sure everything that you want is in your loop........try carrying your loop until you hear the same note played again....if that is not possible cut off at a point where you would think it is a bar....leave a tail end so you can catch it smooth....you might wanna turn the "poly" to "mono" or "note off"...... then match it up to the bpm and use your ears......good luck

thanx fo the insight....