I created a multiboot cd with 4 different version of xp. OEM and Retail home and pro. I also added a few other features like pn8, ghost, win98 bootdisk, ntfspro, etc. Everything is workiing really well now so I want to take it one step further and add an option to all the xp's to also do an unattended install. Now I'm not really sure how to go about this. If I make 4 new folders that are clones of the xp install files and add winnt.sif to it and tell cdshell to boot that install for the unattended will that work? Or I could make images of a win98 floppy and have the autoexec.bat run winnt.exe /u:unattend.txt /s:<cd path>\root\winfldr\i386 The problem with that is how do I get the drive letter for the cd rom drive that's in use? All the computers I work on are different so everything has to be dynamic. If anyone knows of easier ways let me know. I came up with these ideas late last night.