Since Notepad can't differentiate between HTML, CSS, XML files and a TXT File you should use a program like Notepad++, which can differentiate between various programming/scripting formats, to edit any of the files used by MediaCenter.
One thing that using Notepad++ will reveal, but Notepad won't, is that Line 8 in all 3 HTML files contain 3 instructions that have been Redacted (declared Obsolete) and are Ignored by versions of HTML that were released on or after those instructions were Redacted..
Unfortunately the Noire Viz TrackInfo Plugin is not set up to display the Metadata for more than one Field/Tag on a line so you are going to have to make the same changes to all 3 HTML files and the CSS file to get it to do what you want.
But before you attempt to make any changes to Noire Viz you need to read this MC Wiki page:-
https://wiki.jriver.com/index.php/Track_Info_Template_SDK That page will reveal that the Instructions in the format Noire Viz uses to get the metadata for individual fields/tags, i.e. TRACKINFO_INSERT_ARTIST, are only set up to handle a restricted number of MC fields/tags.
To obtain the Metadata for any fields/tags not handles by a TRACKINFO_INSERT_ instruction you have to use this format - TrackInfo_Insert(field name) where field name is the Name that has been assigned to that field/tag when it was set up.
It is the one you see when you got to Tools >> Options >> Library & Folders >> ... Manage Library Fields ... and then clicking on that field/tag name in the scrollable list on the left to expose the information about that field/tag.
N.B. when entering the fieldname into a TrackInfo_Insert(field name) instruction it must have that same English spelling and Capitalisation that was displayed for its Name on the Manage Library Fields Form/Window.
For a TrackInfo Plugin the most important thing is to change the Name of the Folder that its files are held in, if you don't the next time a New Version of MC is installed your modified version will be overwritten by the Original (unmodified) version.