It's moded bios for T520i by submitted by Serg008 Flashed it, thanks!! Seems like it works but I have some questions... I disabled internal wifi in laptop, but the new mini pci card I inserted won't show up in lspci list in Ubuntu 12.04? It's strange but even then I'm able to connect to wifi network, and my MAC address is changed so it seems I do use newly inserted mini pci card (DW1510). So I guess, everything is alright in Linux, but the reason I did it all was to make wifi work in OS X Lion... Sadly, OS X is not recoginising anything, and I have yet to surf around to see if I can enable the card... Anyways, thanks! Machine is not complaining for dissallowed hardware at boot.