^as title states. i'm using logitech z-5500 speakers via optical on my os x partition. works perfectly. get perfect 5.1 surround sound. on windows 7, i'm a little confused. not exactly sure how to set it up. they work fine (hear sounds through all the speakers), but when i play half-life 2 or other valve games, the games only allow me or "sees" that i'm using a 2 speaker set up when i really have 5. i want surround sound for my games. any ideas? oh yes, i'm using a early '08 15 inch mbp.