Hi everyone. Today I'm working on making a custom web part basically, which is a side bar menu which opens up to a hierarchy when clicked on.

First of all, I organized the hierarchy properly both in the file system structure, but also using the Categories section under the Administration Tab of the CMS.

There are 5 main categories which can be clicked on, and I would like them all to be displayed in that left hand side bar. Then, when a user clicks on one of the categories, I would like it to pop downward with only the first level of subcategories (as opposed to all the levels). Finally, each of these subcategories should be a straight link to a page (where the actual members of that subcategory are listed).

Does anyone know how to make this happen? I'm stuck at making the web part on the left hand side of the page. I don't know how to add this Web Zone or Web Part, let along customize it. Seems like a common thing to have to do. Thanks!