[android-developers] Is it possible to revert back to Honeycomb without rooting the Mototrola Xoom which got upgraded to ICS?

I upgraded Motorola Xoom to official update of Icecream Sandwich 4.0.3
Now, for some reason I need Honeycomb back on Xoom. How should this be
achieved ?

I did a Factory reset , but this only went back to 4.0.3 with all apps
and settings deleted. I need an official and recommended way which
will not void any warranty or broke the device.
If someone can point to a page/link officially from Google, which
gives steps for this, that would completely answer this question.

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