Hi Keith,
I must admit I haven't found a way of loading more than one set at a time from disk either, because when you load the 2nd set it definetely appears to wipe out your first set, even though you've moved it to a different position. ie 1 to 3.

The only bizzare way I can think of , would be to step record the 2nd set of pads to the sequencer, use the apc to smf convert and use the sequencer to pad function. Could be messy with pads 5 & 6 ,though because of the chord progression.

If you find a better solution, please let me know , too.

best wishes
Rikki