If your single track is in mp3 format, try the freeware MP3 DirectCut: http://www.rz.uni-frankfurt.de/~pesch/
Another fine utility, and the one I prefer, is an older freeware version of
what is now shareware: MP3 TrackMaker 1.2, third from the bottom on this
page: http://www.nonags.com/nonags/mp3man.html MP3 Trackmaker is nice in
that it can be used in conjunction with WinAmp- just play that big file of
yours, pause it in WinAmp where you want to make the split, and click "grab
winamp position" in TrackMaker.