The IBM/Lenovo X60s has two Mini-PCI-Express slots: One for a WLAN and the other for WWAN-device.
IBM/Lenovo whitelists some device according to their PCI IDs in the BIOS. So if you want to use a WLAN or WWAN card that has not been “blessed” by IBM/Lenovo you will see the error “1802″ or “1804″, the BIOS will disable the device and it can not be used by the operating system.
“Zender” did a lot of work and published information on how to bypass that errors. If you want the direct URL to the BIOS modifications contact me as Zender does not want the URL to be publicly available.
Using his BIOS modification and the instructions on thinkwiki I put together a BIOS update CDROM-ISO to upgrade the BIOS from an external USB-CDROM which I tested on my X60s but it should also work on X60. Two notes: If you already have the latest BIOS version, you have to downgrade the BIOS first and if you have a custom logo you have to remove that (and than apply it again).