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You can build your file in Illustrator® on the Mac or the PC. Doesn't matter at this point.
Export your art as an EMF (enhanced metafile).
If you are on the PC, no problem. Just open PowerPoint and import the art and ungroup it. However, if you are on the Mac, like me, you have an extra in-between step.
    Find a friend with a PC, or get one, and put the art on the PC computer desktop first.
    Import the artwork into PowerPoint on the PC.
    Now, ungroup the artwork (break apart), and you have an editable vector in PowerPoint.(Whew!)