Here's the build thread:
Budget RX8 build Prius gen2 DC - openinverter forum
Here's the development thread started by Damien and contributed to by a few others:
Prius Gen2 Inverter DC Motor Controller - openinverter forum
On the last page there somewhere, a different person had written some different code for it I think.
I was wrong, he melted his motor, temporarily, the inverter held up just fine to 1000 amps, at only 200v. I think it'll take 350+v, so, lots of power still left on the table for him. He was only using 266 hp.
And, the guy who built the RX8 (EV8) is going to be finishing off his design soon and publishing it. Which, he does seem to be regularly working on.