Thank you Frank, I shall visit those sites and see what comes up.
To answer my own question, I think I read somewhere the Garmin Etrex holds 500 waypoints.
I have a Garmin 152, car mounted, but I can't connect that to my computer either!
The data is save in a Word table, and I converted it to text and came up with an .ans file ending. It needs to be hand dressed a bit, and then I expect it will be a tab separated document.
The Garmin website doesn't mention 'inputting' data, only all the wonderful things it does once the data is there!
Thanks for your help - kitmax