Removing MP3 Files or Folders
You can remove MP3 files or folders from the Audio content area. (This does not remove the original MP3 files or folders on your hard disk or from the iTunes® Library.)
To remove files or folders from an MP3 disc:
1Select the MP3 files or folders you want to remove.
2 You can remove files or folders in any of these ways:
Click the Remove button.
Press the Delete key.
Choose Edit > Clear.
Toast removes the files or folders from the Data content area.

See Also:

Overview of Making an MP3 Disc
Creating a New Folder for Your MP3 Disc
Organizing Files or Folders in an MP3 Disc
Renaming an MP3 File, Folder, or Disc