Add and remove item types from the New Menu
Add Item Types

When you right-click on your desktop, there is a New submenu that contains a list of templates. A template is visible
if the related entry in the [HKEY_CLASSES_ROOT] hive associated with a file extension has a sub-key called
ShellNew.
For example, on the New submenu there is an entry for Text Document. This entry is visible because of the key [HKEY_CLASSES_ROOT\.txt\ShellNew]. Create a blank document of the corresponding application, and put it into the Windows\ShellNew Folder. Go to that file type under [HKEY_CLASSES_ROOT], create a subkey named ShellNew and create the string-value File Name in it. Change this string's value to the blank document's filename.