Prevent audio and video files from updating in music library in nokia phones.

Hi Friends,
we all know that Nokia is the most trusted Brand in India at this time. It has many extraordinary features in it. But it's s40 series i.e. Java phones like nokia 5130 or 2700c have a problem that when want to hide any video or audio file in our phone that other can't see it then although we can hide folders by " file explorer " which we can download from getjar.com. But even when we hide our folder. There audio and video files comes in music library. But i have a trick to prevent it..
Just make a folder in your memory card named " tones " and put your files in it. It's contents will not appear in music library.. Then you can hide this folder..
Enjoy.
If you get problem further. Reply must.