Sending graphics to back by scripting - without using Fcodes

Dear fellow FrameMaker scripting geeks,

I am creating graphic objects (rectangles) in FrameMaker to make the content look 'boxed' without having to revert to 1-cell tables. My script is creating rectangles on the page with the right location and dimensions to make the content look boxed. So far, so good. But when I have a filled box, I need to push it to the back after creating it. And although I can do this for a single box using the Fcode for the GraphicsSendToBack command, this turns out to be very unreliable when I have a number of boxes in the same document.

Does anyone know an alternative method to make the new rectangles move to the back of the page so that the actual content becomes visible again after creating the boxes ?

Many thanks for any ideas you might have.

Jang