RegMagiK lets you jump from your Web Browser to specified Registry key in one click using HTML links to Registry.
To view environment variables go to the registry keys: Local Machine Environment and Current User Environment
Startup commands are stored in Registry for current user and all users
To see where mouse pointer themes are loaded from go to the registry key: Mouse Pointer Schemes
You can set the timeout of picture viewer slide show here .
or see the list of Approved Shell Extensions