I have been going insane. I have searched, and read and luckily I am using a re-writable CD for this. Problem: since Tweakui is no longer an .msi file I wish to run a simple command file to copy tweakui (extracted from the .exe) to the system32 folder and create an icon in Control Panel, seems simple enough to do. Below is the very simple tweak21.cmd file I created, followed by the reg fix for the icon. Command 1 %CDROM%\Install\Powertoys\Tweak21\tweak21.cmd Command 2 regedit /s %CDROM%\Install\Powertoys\Tweak21\tweakui21.reg Tweak21.cmd cmd /c copy %cdromdrive%\Install\Powertoys\tweak21\TweakUI.exe %windir%\system32\ exit The problem is that all my other programs work from the CD, paths are not an issue. I have tried cmd /c copy, copy, xcopy,........etc. Tweakui will not copy for me when using WPI with it checked. But if I go to the folder on the CD and click on my Tweak21.cmd, then it works fine. So it seems like the command file is not working right from WPI. Does anyone have any idea...............I am fresh out.