Please excuse my n00bish question, but I've tried searching almost every resource site on the internet. I'm considering buying these speakers but I'm unsure as to whether they'd work on my PC. I've had a look at this tutorial but still need some help. On the second linked page there are two configurations and my one best resembles the lower image. There are three jacks on my PC: a green, blue and pink one. In the XP Control Panel, I can change these to 'Front Speaker Out', 'Rear Speaker Out' and Central/Subwoofer Speaker Out', as suggested by the site. Does this mean I'll be getting surround sound or do I need to purchase a new sound card?