thank to ilko_t. over 4 months I read this thread. Finally I could make a usb multiboot xp pro sp3 (integrated onepiece sp3 update, DPBase, nLite), Win7 and liveXP in USB HDD.only every finished installing XP, UFD / USB HDD with over two partitions, one partition of the HDD is not visible in explorer. I partitioned the USB HDD into two partition.how way to make a second partition can be seen in explorer? I have read about rdummy which I think can handle it, but can not. thanks for guidance.I use google translate