How to Save a Mp3 file and Text file on the same form?

Question

I am learning VB so please be gentle!  I am creating a program that has a basic media player on it that the user can select which ever mp3 files they want and also a text box that the user can type their own  information/words/lyrics into - on the same windows form.  Both items are independent of each other.  I want to know how I save this, that is,what file format to use so that if the user opens it up again the mp3 files and the text they typed come up.

Is this possible or do I have to create my own file extension?

Thanks