apologies if i am barking up the wrong tree here...
perhaps you may want to experiment with The Martix View. personally i do not use this function however, it allows for a some what efficient way to lay out WAV files to be used multiple times within a track... its some thing like a loop, trigger and player thinngy. seeing this in action once, allows control in terms of rows and columns, individual cells...etc.
its relatively easy to drag and drop the WAV into the cells and then use the MIDI Learn to assign to the keyboard.
as mentioned above, there are plenty of sample playback devices avail, however, its extremely time consuming to really map out an entire keyboard range. (61 keys is bad enough, let alone 88 keys...

) i am not sure if your samples are keyed and tagged correctly, if not you may need to also specify the pitch ranges and quite a few other stuff...
good news is when you are done with it all, you'd be the resident expert in the ADSR, Pitch and Formant Department.

hope it helps... and all the very best... cheers!!!