Phil Taylor kindly show his ICE Rigging compounds on Softimage Community Forum.
Here is the video of "ICE Kinematics – Rigging Constraints"

Here is a brief description on the compound in attempt to re-build the graph
Note that ICE Kinematics are totally unsupported by Softimage for this release.
You can enable this by setting environment variable XSI_UNSUPPORTED_ICE_KINEMATICS on, but you’re on your own!

Another brief description on the compound in attempt to re-build Surface Constraint compound in XSI 7.0 with ICE
This is also part of Phil Taylor video on ICE Rigging compounds on Softimage Community Forum
Note that ICE Kinematics are totally unsupported by Softimage for this release.
You can enable this by setting environment variable XSI_UNSUPPORTED_ICE_KINEMATICS on, but you’re on your own!

To animate all 84 keys will requires a lot of time which I don't have.
As last resort I build up a rigid body dynamic rig to speed up things.

As Domino Effect is one of the easiest thing to show how dynamics simulation works, I put up a tutorial for it in this site.

Tutorial (English)
Tutorial (Bahasa Indonesia)

This tutorial will discuss on several issues, how to build the geometry for the crown, how to bake rigidBody simulation, and how to adjust the result.

Tutorial (English)
Tutorial (Bahasa Indonesia)

One of the most useful things when dealing with a lot of variation in surface color is using a switch node.This tutorial is written to cover only the basic use of it.

Tutorial (English)
Tutorial (Bahasa Indonesia)

This tutorial will discuss on how to instance geometry without using instance, how to implement the concept in making connection for blendshape target.

Tutorial (English)