The photo didn't show up...Francesca is on Flickr and has a great tutorial on gumpaste roses, along with more of her amazing cakes.
I've also seen a good tutorial on how to do the stripes...they're shown on a regular cake but the same principal would apply on a topsy turvy. http://www.flickr.com/photos/[email protected]/2839854435/in/set-72157607165399596/
I was thinking of the same tutorial. I would love to try it as well.