Need to add a seek bar / scrubber to an SWF Movie using AS3

Hi,

I'm relatively new to flash and I'm trying to add a seek bar / scrub bar to an SWF movie using AS3. I've scoured the web and have found many ways to do it using AS2 but I absolutely have to use AS3.

Here's an example of what I'm trying to do, if you look in the lower left hand corner you'll see a scrubber that lets you scrub through the movie, that's what I need.
http://www.thatcherdesign.com/LifeWay/sgl/SGLwebinar3.html

The following thread explains how to add the scrub bar shown in the link above however I'm unable to follow:
http://forums.adobe.com/message/2249161#2249161

I really don't know much about flash so if you could please explain very clearly or possibly provide an FLA file that would be great! Thanks in advance.