Well the functionality and the commands that can be run in the w32 mode vs dos . I am using Altiris with a Bootworks client which is Dos based and diskpart utils and some other commands don't run under dos , so wanted to lay down the winpe boot image run a script to see disk size , carve it up by a % hide some and format ntfs , then run a unattened build for testing purpose's and all 60 machines are different hardware and the old way of doing was going to each machine and running a cd or floppy to start the unattended os. The other thing I was going to try is make a dos image with xp/i386 dir and files from the cd and run a unattended install from that , but I then need to figure out the disk carving part out ? Thanks