ForceDirected and Orthogonal

Hi.

I have to arrange a network with about 70 nodes with the force-directed-layout-algorithm and I want to display the links orthogonaly.
Is there a way to force the nodes into columns and rows to minimize the corners in the links?
Now, the layouting produces a graph where many parts of it look like a stair.

thanks.

Can you send us a screenshot of what you are getting?
thanks.
Jake