Obviously to do this quickly and easily you should do this in Versus
with two controllers.
A drive cancel is done by inputting a special move then doing another one as soon as it hits, it also requires 50% of the drive gauge.
To do this i used Athena
and used Psycho Sword
(623+LP or HP) and cancelled into Phychic Teleport
(236+LK or HK, although you only have to hit LK or HK for it to cancel into it)
To start you should set the rounds
to 1 in options, then select 1v1 Battle
and set yourself to Level 5
(Full gauges) and player 2 to Level 1
(easier to kill when you do the drive cancels)
and for the numbers i use to represting directions, its simply the number pad.
so 8 is up and 2 is down and 3 is forward down.
And just a little hint, if you went into hyperdrive mode and did the exact same thing it would count as an HD Cancel