Yes, there is no button highlight shown when a button is selected in standalones.
I can navigate and activate the menu without knowing which menu I would be directed to due to no highlight was shown.

Yes, I replaced the DLP main menu with the original DVD main menu coz the subtitles menu in the original menu is VM Scripted.
If I did it vice versa like your instruction above, I have to delete some of the useless VM commands. Since I'm a VM Script naive, I'm afraid the subtitle menu might not be working well.