Compound editable field in Grid?

I was wondering if there's a way to make a compound editable field in Grid ... like what SlickGrid has here:  http://mleibman.github.com/SlickGrid/examples/example3a-compound-editors.html

I need a field to display a quantity and a unit (e.g. 23.5 grams), and I want to be able to click into that field and get a NumericTextBox for the quantity, and a DropDownList for the units (allowing people to change units from grams to ounces, etc.

Is this possible?

Thanks!