Hey im new i just got my macbook pro 13" and im goin to be using it as my desktop but i ran into a problem. I want to run my 5.1 surround sound on it but it has 4 plugs goin into my desktop and my laptop obviously only has one headphone jack. I have a Logitech X-540 70 watts 5.1 Speaker. I have been looking at usb sound cards and stuff but i need it to be compatible with a xp and mac os x. Any help would be much appreciated.