Note: MPC 2 software is included free with your MPC hardware purchase:
Akai Pro | Is my MPC hardware eligible for a free copy of MPC 2.0?
Akai Pro MPC 2 Software | How to Download, Install & Activate
Attempting to use the MPC Studio MKII as a generic MIDI controller without launching MPC 2 software or the VST version in your DAW, will not give you the option to customize the pad mapping as this is not how the MPC's have been designed.
If you do require a MIDI drum pad controller for this purpose, please see the following alternatives below:
MIDI Pad Controller With Sliders MPD226 | Akai Pro
MPD232 Step Sequencer With MIDI Pads | Akai Pro
LPD8 MKII Laptop Pad Controller | Akai Pro