I couldn't decide whether to post it as I suspected it was a bit of a cheat. When Lino Miele or David Swenson do it, they lift up as if they are about to jump back and just keep lifting their hips higher and higher until they're taking their legs up into a full handstand. It's quite slow and very controlled. In mine I tend to swing forward, using the momentum to bring my hips up and on into my handstand. It's a cheat.
Of course it's completely pointless. I kind of like that Sharath does none of this kind of thing in his DVD, and yet it's fun and almost makes you look forward to Navasana. Come to think of it, anything that makes you look forward to Navasana can't be pointless.
Here's Boodiba showing us how it should be done. http://boodiba3.blogspot.com/2009/04/saturdays-primary.html
Am doing a lot of Primary at the moment (trying to tidy it up a bit before visiting a YP) so will work on the proper version and see how it goes. Day off tomorrow so I'll post something on where I am at the moment.