I download my pictures to a folder on my desk top and when it gets to a certain size then I burn to a DVD. My new Pentax camera automatically puts the pictures in folders by date so when I down load to my computer I just change the date around to 2008_Month Day (with a few words to indicate what is in the folders like Vac pics, Hike pics etc) so that the folders are in order by year and month. I always burn two DVD's and mark one backup and place it in a different place for safe keeping. The DVDs that I use are in little "notebooks" that Walmart sells and I mark the year on them...easy to find pictures!
To bad you won't let your Mom have a computer. An elderly friend of mine bought her first computer two years ago at the age of 84 and she really has enjoyed it and has had no trouble learning her way around the computer.