CorelDRAW X5 :: Adding Perspective To Grouped Objects (specific Dimensions)

I need to find a way to add "perspective" to grouped objects that include a bitmap and other drawn objects. I can convert everything to a bitmap in needed.  What I need this for is I engrave this grouped artwork onto drinking glasses and I have to adjust the artwork for the differences in the diameter of the glass. I need to be able to set the width of the top of the artwork with a numeric value and the bottom with a different numeric value.

An example of the problem with the engraving is that if I wanted to engrave a one inch square half way down the glass I would have to make the top of the square 1.1 inches wide and the bottom of the square 1.2 inches (the math is not right with this example) so a trapezoid turns into a square once engrave on the tapered glass.

The image below shows a sample of the artwork I need to engrave. The right side image is an exaggerated example of what the artwork would need to look like to work right once engraved. I could only adjust the black ring but not the text or image in the center. The third image is to show a trapezoid.