This may be the case. There are issues in XP regarding slipstreaming that are actually features, not bugs. Perhaps Microsoft thought that if one slipstreams updates, then one must also include drivers. In my case, this is NOT desirable behavior, but it might be simply the way God (alias Microsoft) intended it. I seriously doubt 7Customizer is at fault here, just like nLite was not at fault for the "bugs" in XP's slipstreaming process. I have health, and other issues which prevent me from spending as much time on this as I would like, so the actual purpose of this question was to tap into others' experience. So if there is a way for anyone else, who has more resource than I, to test this, I would appreciate the help. Also, since I did not get lots of definitive answers, AND because Win7 is so new, I suspect that this information would be useful to everyone else. Thanks for your answer, which is so far, the best I have received. I will try to test this myself, but it will take time because I only have a couple of hours a day that I am well enough to work.