Pads

Note number Layout	A				B
49	55	51	53	73	74	71	39
48	47	45	43	56	62	63	64
40	38	46	44	65	66	76	77
37	36	42	82	54	69	81	80

	C				D
79	35	41	50	95	96	97	98
70	72	75	78	91	92	93	94
60	61	67	68	87	88	89	90
52	57	58	59	83	84	85	86

Note Layout	A				B
C#3	G3	D#3	F3	C#5	D5	B4	D#2
C3	B2	A2	G2	G#3	D4	D#4	E4
E2	D2	A#2	G#2	F4	F#4	E5	F5
C#2	C2	F#2	A#5	F#3	A4	A5	G#5

	C				D
D3	F2	B1	G5	B6	C7	C#7	D7
A#4	C4	D#4	F#4	G6	G#6	A6	A#6
C4	C#4	G4	G#4	D#6	E6	F6	F#6
E3	A3	A#3	B3	B5	C6	C#6	D6

GM Layout	A				B
Crash Cymbal 1	Splash Cymbal	Ride Cymbal 1	Ride Cymbal Bell	Short Guiro	Long Guiro	Short Whistle	Hand Clap
Hi Mid Tom	Lo Mid Tom	Low Tom	High Floor Tom	Cowbell	Mute Hi Conga	Open Hi Conga	Low Conga
Electric Snare	Acoustic Snare	Open Hi Hat	Pedal Hi Hat	High Timbale	Low Timbale	Hi Woodblock	Lo Woodblock
Side Stick	Kick Drum 1	Closed Hi Hat		Tambourine	Cabasa	Open Triangle	Mute Triangle

	C				D
Open Cuica	Acoustic Bass Drum	Low Floor Tom	High Tom
Maracas	Long Whistle	Claves	Mute Cuica
Hi Bongo	Low Bongo	High Agogo	Low Agogo
Chinese Cymbal	Crash Cymbal 2	Vibraslap	Ride Cymbal 2

You can download the above layout in Microsoft Excel format here or in Acrobat format which can be found here.

You can create your own custom layout too. Just create a new program and assign note numbers to particular pads with the use of sounds. Just save this program and load it as a "template" for new programs when you want to add sounds. An example I have created uses each bank as an octave on a keyboard. I used 6 of the lower 8 pads as the lower half of an octace (bottom row for the white keys and 2nd row up for the black) and the top half for the other 6 keys of the octave in the same manner.