If you rev it in neutral and drop it into gear, you WILL break something.

Your best bet is to experiment between brake-torquing (holding down brake, while in drive, and using the throttle to push against the "locked" brakes) and just normal flooring it.

Manual shifting from D1->D2 .. etc... doesn't help. Just put in Drive and nail it.

I know it feels like you should be doing more, but there really isn't anything you can do. Just keep modding. Look into a 5-speed swap (as you can get about 5-10% more HP to the ground), or just make your tranny bulletproof and load up the boost.