Hi there Thanks for all your replies so far - but I am still struggling...... I want to be able to copy the sourcefiles for OS and Apps to the C drive before starting the unattended install of W2003. However, the machine inconsistently hangs when I take the CD out and put the source files Cd in. I have tried the /INRAM switch and i thought I ahd solved it, but every so often, if I suddenly move the mouse, etc after the WinPE CD has been removed it will hang. I have copied the WinPE i386 directory to C: and run the batch files using the CMD.EXE file from c:, I have changed the path variable to point to C:\i386, etc and stil it hangs. Any ideas? Is this possible?