I removed the whitelist to get a different 3G card to workhttp://blog.oeschey.de/2010/05/lenovo-s ... bios-hack/
that works good. Keep in mind, that the 2nd PCIe slot (the one I soldered on) is not a real PCIe slot, theres just the USB portion usable. So real PCI cards have to go into the slot where the WLAN card is.
I couldn't verify if the BIOS hack also removes the whitelist from the right slot, because I have no other WLAN card, but since the 3G card works I guess the whitelist is completely removed.