English Grammer in Use CD ROM

I purchsed the cd rom English Grammer in Use. very good cd rom for my children. I need to make a backup copy which they can use most of the time instead of the original which i fear could easly be scracthed. How on earth can I make a backup copy. I made one copy but when i tried to run it gives a message something to do with securom. any software that i can use and how? :rolleyes: