Thats a very clever approach for our VBA code. I'm surprised it doesn't also work in the 2007 version.

In the future version we will allow you to write something like

=rendereqn(A3)

directly into a cell or from VBA.

However we haven't enabled this feature at the moment, its somewhat down the list of priorities. Let me see if I can't bump the priorities :)

How are you finding Excel Render otherwise?