Well, Unattended is quite a bunch of script fo automating the creation of an unattend.txt file an run any kind of Windows 2000, XP, 2003, even on Workstation or Server. Here's my conclusion, -All script are made with perl (quite powerful language) -Custom Untattend could be made (if MAC adresse = XX:XX:XX:XX:XX then computer name will be XXXXXX) -Auto Domain/AD joining with credential erasement after installation. -Complete Silent Applications process( even with MSI, Installshield, innosetup, etc...). - Automatic patch installation. What missing ? Well, maybe a nice GUI "à la" RIS wizard. The linux version of the boot disk is note quite easly customizable... So we use it mainly for creating specifique machine configuration or Disk image original machine. So we install a complete solution in about 25 minutes....