at first, i'm sorry for my bad English. I'm trying to improve it. i got a problem with your tool when i used it to setup my own windows xp ( i built it by RVMi with 3 addons: XPSP3_QFE_UpdatePack for Windows XP Post-SP3, OnePiece Windows Media Player 11 True AddOn v2.5.0 ENU and OnePiece IE8 WinXPSP3 v2.8.0 AddOn ENU, and i created a winnt.sif (attached file) Language Group I choosed is: US, Vietnamese, Japanese, Chinese, Korean. And all problem i had is: 1. At blue screen stage ( i don't know what its name ), when copying, it misses some file: ie4uinit.mui.... about 4 or 5 files. I have esc to skip 2. At next stage ( i think it is gui stage ), it misses all of font file i need for the Languege Group and some file i don't know. But when I run setup.exe (winnt32.exe) directly from Setup folder, the installation work normally. can anyone help me? WINNT.SIF