Add a custom file extension to Netbeans

I am trying to figure out how to add a custom file type to be recognised by Netbeans.

I am editing .tpl files and I would like them to be recognised as PHP/HTML files.

I've looked here and here but I cant find cnd.properties in config directory and there is no Advanced Options dialog in the options dialog.

I'm using Netbeans 6.5 with PHP and all modules up to date.

Let me guess, for Smarty templates? I did the following

1. Open Tools and Select Options.
2. Select Miscellaneous tab.
3. Select Files sub-tab thing.
4. Click on New file extension and enter tpl.
5. Select the mime type.
6. Click OK. Done!
7. (Restart of Netbeans may be required to see the actual changes)

In NetBeans 8.XX this is achieved by going to NetBeans > Preferences > Miscellaneous > Files. In the row File Extension click on NEW and enter your new file extension without the dot (example: tpl). Choose the Associated File Type (MIME) and click Apply.

Go to

Netbeans
    tools
     options
      Miscellaneous
        Files

Now find the row file extension select tpl . Then most important to Choose the Associated File Type (MIME) as text/x-php5. After save this, restart netbeans.