To combine the riveted tabs with the rectangle, the quickest and easiest way was to remove the lettering and then use the jigsaw tool to create a new vector. I then deleted the original tabs and border.
I then created a new rectangle using an offset of the outside vector. This would be used to create the domed inside portion of the plaque. The lettering was then brought back in and positioned.
I then created a flat relief using the outside vector.
This relief was then modified using the tabbed rectangle to sink the middle portion. I then Used the second inside rectangle (without the tabs) to create a new dome shaped relief. I applied a wiggly line bitmap to this area.
Then I used the dome tool once more to create the rivets on the tabs.
Then I created the lettering outline relief and positioned it vertically in the front view using the up arrows.
I could then merge highest this relief with the base relief.
