Column A is the Longitude and B is the Latitude. Column C is the description of the POI.
You can only have these 3 column and click on File and select 'Save As'.
Next change the 'Save as type' to CSV (Comma delimited).
Then, open POI edit. Click on the Tools tab on top and selec 'Batch Convert'.
Make sure your source directory is where you have the CSV file. and select your destination directory.
On the left hand side make sure the source format is Garmin Comma Seperated(*.csv). Make sure that the right side (destination format) is selected to TomTom Binary (*.ov2).
When complete, select Convert and you'r done!
If you have any problems, you can also email me the file and I'll convert it for you.