I just bought a yaskawa that is the same. Don't know how I'm going to drive it. There are certainly drives out there that will do it, but I'm not ready to pay the money for them. Effectively, you need a sensorless drive.
We were playing with an impedance meter and a 3 phase induction motor yesterday. The impedance changes markedly with rotor position. I'm going to do the same with a PM brushless although I expect to see the same thing. What this means is that a drive can do an impedance check at startup, and then there is no need for commutation information. I figure that the impedance check could be performed at a high enough frequency that the motor wouldn't respond. A small bump would probably be required to see the relationship between all three windings.