I think PP works with vector files by Illustrator, but I don't own Illustrator so can't say from first hand. However, to do zooms, pans, Ken Burns effects, etc. all you need to do is begin with an image file that is much larger than the 720x480 (rd pixels) screen format. To get the image to show full-frame, merely downsize it in your NLE and to zoom, use keyframes and increase the size, changing screen position for pans, etc. Play with a pixel density of 150 to 300dpi to see what works best for you.