I've autocrossed my SE a couple of times. However both times I still very new to it all so I didn't know much about what I was doing (i still don't), but I do know that the stock tires are sucky, and when they start to scream they are just slowing you down. I know it sounds pretty cool but it only results in bad times, and massive amounts of tire wear.
I vaugley remember hearing that the SE v6 is actually better to auto cross in due to the lower weight and the fact that the torque is avaiable lower in the RPM band. Not that it really matters much on your first autocross.
The one thing I did find was that the v6 can stay in second gear almost all the time. It might be a good idea to stick to second gear until you are more comfortable with heel toe downshifting. I've said enough now, just remember to have fun while you are out there.
Peter