Morrowind hangs in the last chamber., Any help would be apreciated. Options

[jack cloudy]

Alright, so I've fought my way past all seven Ash vampires, chatted with Vivec, got Sunder and Keening and gave Dagoth Ur a serious headache the first time we met.

So I get things ready and step in the chamber with that big Akhulakhan thing. 2 seconds after entering, the game always hangs and I need to press that fancy little reset button on my computer. If this is the way Dagoth Ur is going to win, I'm going to feel pathetic.

So far I've checked for enchanted items (those always make my game hang), removed any steam and funny lightsources as well as the big robot. It still hangs. I've tried to make the heart into a Guar, but the Construction set complained about not having any animations or something.
Now I'm all out of ideas with the exeption of buying a new 3d card for which I don't have any money (or permission).

Does anyone have a similar problem? Or does anyone know how to get past and finish the game through the console? Any help would be appreciated.