How can I add or remove filename extensions from a file type?
This is not immediately simple, but you can accomplish this two ways: • Run winfile.exe (File Manager) and use its Associate… menu to add extensions to an already existing file type. The file types in File Manager corespond with the file types you see in Explorer. I recommend this method. • Edit the Registry using regedit. You’ll find all the filename extensions in HKEY_CLASSES_ROOT along with the matching file types. Simply add a new key with the extension as its name (such as “.HTM”) and change that key’s (default) value so it contains the same name as the other extension’s default value (such as “NetscapeHypertext”). You may also add a second String value named “Content Type” to specify a MIME type for this filename extension. In both cases, when you exit the respective program, press F5 to cause Explorer to refresh its display. All files with the new extension will change icons and properties to match the file type you assigned it. This also works in NT 4.0, but you will need to
