[TriAxis]

I'm not positive if this works in 6.1, but in 5.3 heres what I do.
After you are happy with the way the sound file sounds with the fades applied.
Select the sound file so that its highlighted, then consolidate it.
You do this by pressing Shift+Alt+3 (I believe thats the combo}
What this does is creates a new sound file with the fades already built in.
It makes the screen look better too, without all the fade lines.