I'm having trouble finding a "how to" for creating a custom admin section. I think I'm on the right track, I've subclassed LeftAndMain and I've created the SS template files for the left and right. On the left, I have a sitetree list similar to the CommentAdmin.
I've looked at this page and it was helpful, but it doesn't cover how to use a sitetree-like menu on the left:
Any help would be appreciated