Well,I downloaded Sonic CD and I play it in Kega Fusion.I use the US Bios.The game is working good,but the boss theme is the Japan version,this http://www.youtube.com/watch?v=wXLQHs89c-U But I'm using the US Bios,then I want tne USA version of the track http://www.youtube.com/watch?v=HcwyDL3-Qqo ,cause it's more creepy.Please someone tell me how i change this