You can create a shape-based rig from a solved head in Face Robot, and export that rig as a dotXSI file. You can then import the rig into Softimage where you can tweak the animation as you like, and render out from it.
For information on exporting a Face Robot head, see Exporting Animation Rigs (Shapes) [Face Robot].
Using the Animation Rig Export tool in Face Robot, export the solved head as a shape-based rig in a dotXSI file.
In Softimage, choose File 
Import Face Robot Shape Animation Rig.
In the dialog box that appears, select the dotXSI file you exported from Face Robot and then click the Import button.
The rig with its animation controls (represented as small green boxes) is imported into Softimage in a model called Face_Animation_Rig.
If you exported the animation on the controls, you'll see red ticks in the timeline at each frame, which represent the keys on the controls. To check the control's fcurves, select a control and open the animation editor.
You can select the head and open the animation mixer to check that each control has a shape compound clip on a track that contains all its shape clips. Double-click on the shape compound clip to open it and see the shape clips.
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