I'm interested in becoming a host, and I know that to do that I need to post sound files. How do I go about creating sound files? I've got a microphone that came with my gateway, is this all I need? I've heard that cooledit software will also help. I am totally clueless, talk to me like you woudl a three year old . Wait, I know i want mp3, not wav, cause wav is too big. Thanks.