Inspiron B130 wireless interface software

Hello,
I am trying to find the name of the software used to reinstall my Inspiron B130 wireless interface software. I do not have the installation disk that came with the laptop. All other interfaces are working Ok. I am running Windows XP Pro and need to have the wireless interface for my work. I think the file that I need is Rnnnnn.exe but I have tried to find the file that contains the wireless code without any luck. Does anyone know the file name? Thank You.