Nero it convert iso but it detect as non booatble in magic iso and all other iso creater softwares here is the lig C:\>cdimage -n -m -u2 -bD:\Vista\boot\etfsboot.com D:\Vista\ CDIMAGE 2.52 CD-ROM and DVD-ROM Premastering Utility Copyright © Microsoft, 1993-2000. All rights reserved. For Microsoft internal use only. ERROR: With -u2, cannot use -n, -nt, -d, -j1, -j2, or -oi I tried without -u2..Then its work but its not booting C:\>cdimage -n -m-bD:\Vista\boot\etfsboot.com D:\Vista\ D:\V CDIMAGE 2.52 CD-ROM and DVD-ROM Premastering Utility Copyright © Microsoft, 1993-2000. All rights reserved. For Microsoft internal use only. Scanning source tree complete (609 files in 113 directories) Computing directory information complete Image file is 2103830528 bytes Writing 609 files in 113 directories to D:\Vistax86.iso 100% complete Final image file is 2103830528 bytes WARNING: This image contains filenames and/or directory name NOT COMPATIBLE with Windows NT 3.51. If compatibil Windows NT 3.51 is required, use the -nt switch rat the -n switch. Done.