How to configure mouse side buttons

Hi, I recently brought a Dell Studio XPS 8100, with Keyboard and

a 6-Buttons laser mouse (http://accessories.us.dell.com/sna/products/i_o_devices/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=330-2451) ,

Is there a way to configure side buttons? I tried with Windows 7 control panel but I didn't find any options to configure this mouse