How do you add to admincp

[aggiefan]

I've been working on coding a 3.0 creation I made and port it over to 3.5. I've been teaching myself how based on others install scripts (xml files, etc)...but the one part I can't figure out -- and that I want to integrate is the back-end part for admincp. I've learned how to make it show up in admincp's options, but not on the left pane navigation bar. Can somebody explain as simply as possible the coding required to get those to show up?

If you could just point me to part of the code in a hack, I can test and figure it out. I'm just stumped, and it's hard to find in all the codes out there.

Thanks!