XBOX HDMI help?

Question

Ok so I am getting a xbox 360 with the HDMI output on it. but I have it running through logitech HDMI speakers. I have just a normal HDMI cabel. but the 5.1 runs through the componet cabels (Red and White) how do I make this work with the HDMI?. How the speaker's hook up is that you plud the 2 AV cords into a little box then you plug the speakers in to it to. here is a picture of it http://cgi.ebay.com/Logitech-Video-Games-Console-Adapter-2-1-or-5-1-Suround_W0QQitemZ160192074251QQihZ006QQcategoryZ41059QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Answer 1

I just got one last night it comes will all the cables you could possible need and detailed instructions on how to hook it all up don't worry