Whats the best way to go about adding a button in the right hand Navigation bar? We have a web based instant messaging solution and would like a button to be able to launch it from the navbar. I tried enabling the Zimbra IM and this added the Zimbra button, but I need to change the location that the button points to. So I need to either A) Add my own button using my own URL (and this will probably just open up another window) or B) Change the location that the Zimbra IM button goes to (currently its app=im). I tried changing launchZimbraMail.jsp to do "if app==im window.open(myurl)" type of function but it did not change the behavior of the button. Ideas/thoughts?