It's much easier to start finger drumming with XpressPads if you don't have to create your own MIDI presets and layouts. Download them here.
Note that all presets are stored within one file. Scenes 1 to 5 are standard presets for use with ONE iRig Pads controller and are identical in both preset files. Scenes 9 to 12 are (right / left) hand-specific presets for use with TWO iRig Pads controllers.
Reference PDFs for all XpressPads finger drumming layouts. Use these to create your own mappings for unsupported hardware.