Instructions are included on the first page of the spreadsheet!
This update now enables as many or as few fields as you would like to import.
This update now works with GW6.5 and GW7.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.