thinkpad X201 (non-tablet, non-201s) BIOS flasher that will remove the mini PCIe card allow-list lockout, which can be written to a USB flash drive (based on FreeDOS) - thus not requiring an optical drive.
https://archive.org/details/x201_bios_mod_flash_usb.img.7z
Probably works with the other X201 models if you put the correct 'WPH' file in the right spot.