Bud,
If these are in any of the three coordinate formats that we use in our units (DD.ddddd, DD MM SS, DD MM.mmm) than I can help you out. With the original version of HumminbirdPC we could import and export waypoint data as a text file which could than be copied and paste into Excel. The same can be done in reverse but usually takes a little bit to get it right. I am willing to take this on if you are game. Send the Excel file to my e-mail address. It may take a few days but I’ll get it back to you as a *.gpx file that can be opened by the current version of HumminbirdPC.