Explain the akai MPD 18

Hey guys I was looking at my buddie setup and he had an mc-6000 and an akai 18, but was running serato scratch. The thing was nuts he had drops on cue and like random fx songs from certain points and all kinds of stuff. I want to get one since its only $100. Play around with it. I also have an MC 6000 but I run Trakto pro 2. How will I have to change my audio in and audio out settings to make this work? Setting it up with just the mixer was hard enough. Also what else will I need to do to make this a bad larry piece of equiptmen? Thanks! -Laneo