Mountain Lion 10.8.2 and WDTV - Help setting up network share. => Additional question

Hello and thanks for replying!  I did find this link and it was most helpful indeed.  I was able to set up the NFS share successfully provided the content I wanted to send to the WD TV Live was on my iMac, however I couldn’t figure out how to get the export file path defined correctly when the content was housed on my external drive connected to the iMac.  Will the method described in the link work for files on an external drive?  If so, what should the path be defined as in the exports file?