What does CAI hold about Walt Brown's hydroplate theory and the mechanism of the flood?

In our DVD series, day three, we give a hearty nod to the hydroplate theory. I have read Walt Brown's book, and we include it as a possible explanation for the division of the continents during the flood. The difference from the tectonic plate theory is that in the tectonic theory the plates themselves do the moving, whereas in Walt Brown's hydroplate theory the plates rest on huge reservoirs of water, and it is the water that moves the plates. That seems logical, and Walt deserves the credit for it. We understand there was one supercontinent when Adam and Eve were created, and by the end of the flood, about sixteen hundred years later, there were seven continents. The water that had been stored under the firmament, according to Genesis 1:6 to 9, went beneath the earth and remained there until the flood, when it burst up through huge breakages in the land mass with such pressure that it went into the atmosphere and formed the rain clouds. That is how it could rain for forty days and forty nights, because the clouds alone could never hold that much water; there was a continual stream coming up from the ground. Today there is about three and a half times as much water beneath the surface of the earth as there is in all the oceans, lakes, and rivers, stored in a mineral called ringwoodite, which holds water inside its rock like a sponge. So Genesis 1 and Genesis 7 fit together without the slightest difficulty.