The installation of this extension is very simple. Just connect to the Typo3 Extension Repository and download «New Record Wizard CSM» (newrecordwiz), located in the backend section.
You can remove the old «New» menu item right after the installation, if you want to.
Just click on a editable page in the navigation frame of the Typo3 backend to activate the context sensitive menu. You'll see a new element called «New record». Just click on this item to activate the second level menu.
You'll then see the list of elements you are allowed to create, depending of the page type and your user permissions. Simply click on an item to create it instantly.