There's likely a few other ways to do it, but that's the way I like it, and think it works best.
I make my Bouquets right within the OpenwebIF screen, and copy channels over to them as needed, or rearrange them in order I like. However, that doesn't allow you to change channel names. Once they are in a Bouquet though, you can change the name on the receiver itself. When you are in a particular bouquet, hit the MENU button. You'll see all sorts of options appear...