I did not have driver cd..how to install without it

You should have PC with windows XP and windows media player 9 or later.
In this case you don't need any driver.
1. Use the USB connector cable provided with your player to connect the USB port on your player to an open USB port on your computer. The player will appear as a removable drive in Windows File Explorer.
2. Drag and drop music files to the player from any location on your hard-drive or use a variety of music software to move music to your Sansa. For more information on how to use specific software, please refer to the help files provided with each program.

NOTE: Because your Sansa Player automatically organizes your music by artist, album, song title, genre, and year, you only need to copy your music to the player. Your Sansa will automatically create a music library which you can later sort with easy-to-use menus.

Good luck!
Thanks.
gylacz