Kingdom Hearts II Gummi Ship help

Okay, I have a serious problem, and I need someone seriously smart and seriously clever to help me out.

I need to beat Assault of the Dreadnought: Mission Level 3.

I could beat it on my own, but I just have one little problem: that biiiiiiig red and black Nobody Gummi Ship at the very end right as you think you're exiting the gate and it comes spiraling out of nowhere. I've managed to survive its "x" and "+" shaped blasts, survive the explosions where I have to get in the middle of the screen, and I've gotten it down to where it goes completely berserk on me. But that's my problem--it goes berserk on me, and I don't know what to do. It starts throwing explosions at me in random directions and tossing me around the screen, and I eventually die, even with Auto-Life and Auto-Regen to save me.

Now, the ship I use is my own customized version of the Invincible Peak, with Cost Converter equipped so I could equip some more powerful weapons and a few Aero and Engine Gummies to make it fly faster (and it paid off--the thing flies uber-fast). It has three Auto-Regens equipped, a Cannon Upgrade, and Auto-Life. I'd go get its stats, but I'm too lazy right now--I'll edit this post later.

Can anyone tell me how I can improve, or give me a strategy as to how I can beat that damn thing?