The finger pain goes with the territory.. I think that it is one of the biggest subject I've seen posted in the forums..
You just have to endure it for a week or so.. Depends on your pain threshold.. You'll soon have calluses built up and won't have any pain problem if you keep them tough..
There is something that are claimed to help.. I won't quote any because I haven't had experience with them..
You might have one of your son-in-laws make sure your string hieght isn't to high. You can put on a lighter set of strings..