perhaps he wasn't that clear but it seems to me he is talking about assigning each pad to its own channel in AA, ie 8 seperate outputs rather than the default stereo out.
I could probably figure it out if I messed with it a bit, but tbh AA isn't my favored choice for using VSTi's...
What audio card do you use?
You need a card with 8 outputs. Connect one speaker to each and every ouputs and set up your AA 3,0 for 8 outputs:
Edit\ Audio Hardware Setup\ Input and Outputs
You have to assign 8 outputs in corresponding field.
Import your 8 drum files to Aa 3,0 Multitrack view.
Assign each and every of them to corresponding output.