I think the easiest way to break down the AD2 midi files is to drag them out as each part. In the 'Beats' page, there is the transform tab. In there you can see the drums separated into
OTHER
RIDE
TOMS
HIHAT
SNARE
KICK
Mute each row except one, then drag the beat to the midi track. Mute it and unmute the next, drag that out to anther midi track, and so on.

Turn Snap on, select 'To', choose resolution 'Whole'