Audio- Nero 6 and Express series 2

I have been able to make some great picture slideshows with this software. My only question is, when adding audio, can you control the length of the song you add to the slideshow? I can add music but I can’t fade it out, i have to let it play the whole song instead of adding parts of the song or cutting it short. Let me know if you have any answers or know of anything i download/purchase to change these settings… Thanks so much!