XPS420 - Wireless Network Card

I have the Broadcom 802.11g wireless network adapter in my XPS420 Windows Vista 32 bit. I have verified this via Device manager.

I would like to update the driver if there is a new one but when I go to the Dell driver page for my machine I find drivers for Asus, Dell 1505 wireless draft 802.11n, and dell 1395 mini wireless card.

None of these drivers seem to match my Broadcom card. Can anyone explain or point me to the latest driver for my wireless network adapter?