How to change content of DataGrid cell on mouse over

I am trying to change content of a datagrid cell when the mouse is over it. Changing the dataProvider does not provide immediate feedback because update is performed by renderer. I am trying to directly update content of a cell onMouseOver and restore it onMouseOut.
I am thinking of leaving the column empty and insert content onMouseOver, cleanup onMouseOut. Alternative, may be I can populate the column and mask out all but the cell the mouse is over.
Any suggestion on how this may be done?
Thanks!

I would override updateDisplayList, call isItemHighlighted and set the content of the cell accordingly
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui

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