If the waypoints are on a Lowrance unit and you can export them out on a SD card, you can download a program (Humminbird PC) and it will automatically convert them for you. Then save them back on the card and insert the card into the Humminbird unit and it will automatically download them into the Humminbird. The instruction are listed on Humminbird.com. I also have a copy. If anyone needs them just email and I will be glad to shoot you a copy of it.

Joby

Humminbird