How To Post A Quality Recording With Audio HiJack Pro?

I have "Audio HiJack Pro" and love the program! I also love "Snapvine" too and want to record music with a voiceover for my comments and blog posts. I'm recording with a USB mic and the finished .mp3 sounds great when I play it back on my computer, the problems comes when I try to record it to the "Flash Player" on "Snapvine." The only way I can get the audio file on "Snapvine" is to play it thru my speakers and use my "ISight" camera as the mic to record. There must be a better solution other than me playing music in the background while I speak into my mic. I just want to try and other my small group of listeners a quality blog. Thanks for any suggestions and help with this matter.