You basically end up upside down with your body to one side of the pole and hook with your inside leg. Here’s a vid of the transition, though it’s not the best angle

http://i68.photobucket.com/albums/i20/loopylolacherrycola/th_MVI_1269.jpg

There are tons of other ways to get into it, straight edge, jacknife, shoulder mount, flag invert. It can also be done from a basic invert but looks very messy and can be actually slightly more difficult than from some of the other moves because of the amount of adjusting that has to be done.

Edit: That’s a slightly better angle, and I go into Eros at the end, but I am wearing cheaty boots

http://i68.photobucket.com/albums/i20/loopylolacherrycola/th_marksmantobrassmonkey.jpg