Read Instructions Carefully
My laptop is Dell D630, buy an Broadcom 4311 for 5$ and no more fighting @ _ @. At last it work.
You should make sure no IO80211Family.kext files in S/L/E
Then put this file with Kext Ultility, to make sure it work maybe after that you should use myFix or System Ultility to confirm. Cheer hope a miracle for you !!!
Tested On 10.7.0 and 10.8.0