This is basically theft, but it works. There are tons of free midi files on the net, type the name of a song you like into Google and see if there are any midis. Then you can load the midi into Cubase and steal the drum part.
You could also convert Power Tab/Guitar Pro songs to .mid and steal their drum parts.
No, I haven't done it before. I usually don't have a lot of trouble programming drum parts.
