I'm in the same boat, keeps prompting me to insert sp4 My structure is the same as mavericks choice, not sure what i'm missing I copied the whole cd to hard drive then, slipstreamed sp 4, which said was successful, ran through winnt32.exe, changed $WIN_NT$.~BT to 2PRO and deleted $WIN_NT$.~LS (no info that it needs to be kept) and hex edited the required files, all ok so far. When I make the ISO, it boots, starts the install then prompts for sp4 disk I did the exact same for XP pro slipstreamed sp1, works great win 98 works as well, and all the dos utilities I added, ghost, partition magic and a few others, I must have made 25 images so far with the same result, any ideas? What am I missing?