Can't hide folders for Naomi games

[xonglebongle]

A forum search for naomi would bring up the following resolved issue.

How can I hide NAOMI data folders from appearing in the file list?

Hi, some Sega NAOMI games require a data folder with the same name as the game in the same directory to work. However, when I put the data folder in the <system> folder, it shows up in the game list. If I rename the folder by adding a dot (.) or underscore (_), the game doesn’t work. Setting the folder as hidden in Windows doesn’t help either. Is there any other way to hide such folders from appearing in the list? Thanks!