facing a problem with broadcom network card to use wifi in fedora 14.
 

I'm a properly ubuntu user.I moved to fedora 14 some days ago.And i'm facing a problem with my wifi network card.
I am trying to install wifi netword driver on my laptop but its not helping me.I have Dell inspiron 1545 with Broadcom Corporation BCM4312 802.11b network card.i'm unable to find firmware package for my network card.
I have installed everything for wifi which i found in add/remove software option in fedora.
Please help me.
what should i do to use wifi netword on my laptop?
where to find and install the driver to activate wifi on my laptop?

please help me.
thanks

This may help you. it is a bit older, but should still be valid.
By the way, it was the first hit when googling Fedora Broadcom firmware.