why did anz support fge?

The major defining reason I can see relates to slide 9 of the AGM presentation.
As it reads FGE has provided (as at the end June 2013) in excess of $307m in bank guarantee and insurance bonds.
I am not clear on why FGE needs insurance bonds? but we can all only assume that this amount of money is an "up front guarantee" of contractor performance. If the contractor does not perform/meet spec/deliver in required time, then at least the project owner can call on the bank guarantees.
Thus - if FGE went bust/liquidated etc and was not able to complete the scope of works then the customers would be able to call in the guarantees. I can only assume that ANZ is at least the "guarantor" of some/all of this amount.
ANZ appears to have been in a position to lose much more than any of us thought.
The only chance was for ANZ to back FGE so that as FGE finishes their projects (even if at a loss), the bank guarantees then revert back to ANZ. Kortha Menda was there to ensure that the rest of the projects are going ok so that they can be completed and the guarantees can be called back in.

If I am wrong - let me know.

Irrespective, FGE will still have to stand in the market at some time for some equity - they cannot compete in their space capped as they are.