Open Pro Tools, and click the "Audio Regions List" heading in the column on the right side of Pro Tools.
Select the "Import Audio" option from the pop-up menu that appears.
Browse to select the saved track you want to add to Pro Tools LE.
Click "Copy."
Click "Done."
Choose the "Audio Files" folder when asked by Pro Tools where you want to save the track you are importing. After doing so, the saved track will be imported into the audio bin in the column on the right side of Pro Tools.
Drag the imported track into a new audio track in the "Edit" window to add it to your Pro Tools LE session.