Hi msfnco. When you remove anything in RT7Lite, it is completely removed. You cannot add it back in. As billybully so eloquently put it, you will have to redo your iso again Also, the best thing to do is to download VirtuaBox, which is free virtual machine software, so you can install your lited OS to that and test, before going through all the hassle of formatting, reinstalling, etc... on your main hard drive!! Believe me, it is a lifesaver :-)