Hey eb, This is my first post to MSFN & i found it great so far. I am facing the same problem with setupldr.bin of win2003 sp1. well swammer have you reached at this installation stage from Multi-OS bootable disc ? one more thing i dont think checksum is the cause as this setupldr.bin must be created through exe2bin tool ? & if yes then this tool doesnt let bin files carry Image_DOS_Header with them so no point of checksum ? Please correct me if i am wrong whatever be the case, installing win2003-SP1 through bootable disc with modified setupldr.bin fails with "NTLDR is corrupt. The system cannot boot." error message Thanks anshim.