Well, I honestly can't remember in details, but I can remember that I installed both of them, as I saw the title and the notes about this; "737-800/900" and "737-600/700".And yes, I know SP1 was before -this I followed, as well as the other installations.If I was to reinstall (which I probably am going to do, as noone really knows what went wrong), do I need to installer "SP1" again, or should I just installer the "SP1b", for both of the series?