We did this cruise in March 09.
http://www.limafamily.net/photo_album3.php?Directory=Cruise_2009&Name=Cruise%202009%20-%20Mexico
Acapulco - Since being a photography nut we went to see the cliff divers during the day. I got some excelent shots. This tour included a bus ride to show off the new Acapulco over the hill.
Zihuantanejo/Ixtapa - We did the Picante in the morning. They were AWESOME. They even let my wife drive the CAT. Can argue with free beer on the way back to the dock.
In the afternoon we did the swimming with the dolphins, which was INCREDIBLE. This is a must at least one in your life. From what we heard, Delphini was better that other dolphin swims. They WILL try to sell you pictures after the tour.
Manzanillo - We did snorkeling at Elephant Rock in the morning. On the way back they held a beer drinking contest. I would have participated if we were not doing a the ATV tour that afternoon. The ATV tour took you fron their ranch into the hills then on the beach. They let us play on the dunes with the ATV's for about 1/2 hour. On the way back to their ranch we went through a little bit of a jungle.