The CloseApp dlls are completely unusued in the portable version, they are only there to help the installer (I'll update the portable zip maker to ignore them).
The DcKeyHk.dll and DcMouseHk.dll are used ONLY when you invoke the -captureredregselect or -captureobjselect commands, which use a special "red box" overlay on the screen while you are still able to interactive with your desktop. If you don't use those commands you don't need those dlls.