You can create the bootable ISO, and use a Virtual Machine to start it with. Try something like VMWarePlayer:http://www.vmware.com/products/player/ You will also need: EasyVMX:http://www.easyvmx.com/ Or Microsoft Virtual PC:http://www.microsoft.com/windows/downloads/virtualpc/default.mspx That's what I always do to try out my nLite installs, if it's stable and works, I then install it on my main system