Hi I've just this very moment dipped my toe into the world of nLite ...can't beleive I hadn't come across it before I use VirtuaBox on Vista and had exactly the same problem ...when running my nLitened WinXP ISO from a USB drive ( or anything that wasn't C:\ for that matter ) My source disc is a standard UK / US XP with sp1 - cant imagine the Japanese source would be any different apart from the default languages. Copied the exact same ISO to a folder on the C:\ drive and it seems to work fine. For me at least, the issue appears to be a VirtuaBox one. Hope you get to the bottom of it. Jon