When I got home, I put the fruits in a pot with two cups of water and mushed up the pulp as I boiled it for 20 minutes, scraping and discarding the bright pink scum that formed on top. I strained this through a cloth to trap any pulp, seeds, and anything else that had gotten into my bucket of saguaro fruit. There were a LOT of seeds, so I set them out for the birds in my yard. (or you could save them and give them as novelty gifts to out-of-towners

Link to photos: http://hikearizona.com/photoset.php?ID=11541&start=0