Does anyone know of a payload (or payloads) that would allow booting from an mSATA SSD within the second MiniPCI Express slot in an X230 thinkpad?

http://www.thinkwiki.org/wiki/Category:X230 notes that it's possible under the stock BIOS when a HDD is not present, but is it possible under Coreboot? Has anyone tried?

Thanks,

    -Matt