Also it's a drag and drop thing. Make the mixcraft program window half sized say. Open the shortcircuit instrument in a mixcraft virtual track. Click edit on the instrument. The shortcircuit window pops up. Should show a keyboard. Open up your samples folder using windows explorer. Drag the sample and drop it on a key. That key will play your sample. The sample filename will show up in the lefthand column. Click on it and you modify, change its amplitude, add a few filters, eq it, etc. You may be able to set it so that clicking the midi once will trigger the sample and the second click will turn it off. Or you can make choke keys by assigning two keys--a sample key and a choke key--to a group. The choke key has a sample whose sound you turn of. You click on the group header in the left column, and move the polyphony to 1. That's how you do your hi hats, for instance. Three keys in a group, only one plays at a time.