Well, easiest way to do this would be to use the FPC plugin that comes with FL.
FPC is some sort of emulation of the MPC samplers, hence you can trigger a sample by hitting a pad. When hooked to a midicontroller, it triggers certain pads. Might take some time to see, which key, triggers what pad. I recommend using a drumkit preset on that, and just doing a crossreference on what pad lights up.