I dont' have enough info to help, since I'm unfamiliar with the Akai. I would think the Akai would have software with it to rearrange the midi numbers of the pads.
I would guess that SI can rearrange midi numbers, too, tho I haven't messed with it too much. Either way, the midi number assignment is a given with drums, so you will need to be able to switch back to the normal Bank 1.
Another option is to make a second pass w/ the Akai with Bank 2 engaged.