OK, the solution that I think will work is to include an 'other' button next to each of the amount columns I want to drill down on, that allows me to open the selected procedure as a pop-up.
Point if interest, when setting this up I never think to provide a value for the "Desktop Text" field as it is just a button, but leaving it blank produces an error in the generated code. I just put a set of single quotes in the field to get passed that.
Bruce, is there a particular reason why when making the amount value a click-able link as in my first approach, that you don't allow to "Open as Popup" like you do on the button approach?
Just curious.
Regards
Parker