How could I add a pair of radio buttons (w/ values YES and NO) in an edit (and add new in the footer) column of a data grid?

I've seen samples that have one radio button per column to select it or de-select a row (used a lot in surveys) but I haven't found yet an example where the user gets a pair in one column cell for edit and/or adding new records.

Create a template column and put a standard RadioButtonList or a pair of RadioButton controls in the template.