I had some troubles at first getting past the installation of PC Study Bible 4.2C to add the upgrades to 5.0. Here is how I finally got the 5.0 to load in and work. Each disc has to be installed as a separate application. When the disc is inserted, and the crossover installation window comes up, load each 5.0 disc onto the 4.2C bubble, then set it as a separate application in the application drop down box. Once you do this the disc installation window should give you three options. This works until you get to the final upgrade of the set of 3 discs. You then just load in each disc as the screen tells you to. It takes a little longer, but the app works fine once you have done this. The only probelm I have is that the devotional on the desktop screen doesn't work on the correct date.