Hi, I'm using nlite 1.4.9.1 and have never had any issues with it (until now). It's installed on a Windows XP Pro machine. Was going to apply SP 6 to an old NT 4.0 CD, but when I specified the e:\ drive (cd in which NT 4 is in), it came back with the popup window of: Make sure the selected drive or folder contains the 'i386' or 'amd64' directory and proper Windows installation files. (...) I thought there might be an issue of some kind with that CD, so I copied the contents of it to a c:\nt4 folder and pointed nlite to that. Same message. ?? --Ben