hey all, so my problem is that i have an extensive library of mp3's, that i'd like to be able to put on cd in mixes. I'm looking for a recommendation on software (the free'er the better =). I've dj'd for over 10 years, and can figure my way around most basic interfaces, but i'm not looking for something with a steep learning curve. Just something very basic functionality to allow me to set volume levels, and make seamless blends. any ideas?