This is not difficult at all to do with many CD based programs, including copy protected ones. I do it all the time with my medical books on CD. It is really inconvenient to carry them all with my laptop so I just used a program called GameDrive made by FarStone. It stores a copy on the CD drive. No guarantees it would work for Rosetta Stone. They used to have a free trial, but I don't remember how functional it was. I think Slysoft also makes a similar program although I have not tried it.