skype, garageband, and audio hijack pro

I found these wonderful sites on creating podcasts with audio hijack pro, skype and garageband. This one was good, though a bit technical for me http://www.digitalpodcast.com/podcastnews/2007/12/25/how-to-record-a-podcast-using-skype/

My question is that even though I had audio hijack pro on left channel, output right channel how do make them separate? I also found this. http://www.breakitdownblog.com/recording-a-podcast-on-your-mac-using-skype-and-audio-hijack-pro/