Now, I'm not one for tutorials, mainly because I have such a slapdash approach to most of my sewing, there's no real point in taking progress photos as there's no guarantee that anything will actually work out.
However, if you were interested in seeing that alteration in more detail, you're in luck! Glenda, the owner of Sure Fit Designs, has put together a video outlining the process. Just click on the picture below to watch the video. It's not that long, and she explains the alteration beautifully!
While you are there, have a poke around all the other videos that Glenda has made. There's such a wealth of knowledge available to us, it's amazing.
(Just as a disclaimer: I am not affliated with SFD in any way. I'm just a happy customer who is super impressed with the results I've achieved using their pants kit and the customer service I've received.)