DataGridView - add a link button to a Image column

[sklett]

Very new to the DataGridView, but so far I'm blown away by the improvements
over the DataGrid! Anyway, I have an Image column and I would like to
supply a link button under the Image when in edit mode that would fire a
file browser dialog and allow the user to choose a new image.

I can't see where I should start with this. Do I need to extend the
DataGridViewImageColumn?

Any tips would be great. Thank you for reading,
Steve Klett