Broadcom 4311 wifi ubuntu 13.10

I just installed ubuntu 13.10 on my dell vostro 1000 laptop. It has the broadcom 4311 wireless.

It doesn't work, ubuntu software centre shows I have the bcmwl kernel source drivers and the Linux firmware drivers already on. ( I noticed other questions have said the solution is to remove the former and install the latter.)

However I have no way of getting an Ethernet connection, is it not possible to do it from the USB install?

If not, how will I download the packages I need from a friends laptop tomorrow?

On another computer, download this package: http://mirrors.kernel.org/ubuntu/pool/multiverse/l/linux-firmware-nonfree/linux-firmware-nonfree_1.14ubuntu1_all.deb Transfer it with a USB drive or similar to the Ubuntu computer. Drag and drop it to the desktop. Right-click it and select 'Open with Ubuntu Software Center.' After it completes, reboot and your wireless should be working.