Deploy IE toolbar

Has anyone had any experience of deploying a custom toolbar for IE?

I'm working on a little utility that I'd like to be used from within IE so I thought the easiest way would be to create a custom toolbar / button.

I know you can create and deploy custom toolbars in when deploying Office (never actually done that 'live' so to speak either)

My network is 2003 / XP and we're running IE6

Any pointers or tips or any gotchas to look out for would be appreciated

I know that the IE7 deployment kit allows the packaging of extensions in its custom install builder. I think that it will make separate configuration packs also.
Internet Explorer 7 Administration Kit

The info for the IE6 one is here http://www.microsoft.com/technet/pro....mspx?mfr=true but I don't know if it has the same features or whether you can still download it.

Just out of curiosity what is in the toolbar?