I think I answered my own question. The shapes must be a linked representation of the bitmap images. I imported one of the swf generated pages into a blank fla, then tried to delete the bitmaps in the library, and the shapes lost their image and turned RED.
- [Swftools-common] pdf2swf: converts bitmaps to sha... Christopher Cianciarulo
- [Swftools-common] pdf2swf: converts bitmaps t... Christopher Cianciarulo