Advertisements I got an old T60 with v2.5.2. I'm thinking of upgrading (actually a fresh install) to the last version 3.1.0C2, but I want to use a different hard drive in case I mess something up, then I can put the old drive back in and be good to go. I have the light blue directv card, and will it work in a new hard drive with a new OS, then possibly be able to go back into the old drive & OS if needed? The card marries to my receiver serial # and not the actual OS, right? Also, any major differences between 2.5.2 and 3.1.0C2?